Step-by-step explanation:
area of a circle
A = pi × r²
circumference of a circle
C = 2 × pi × r
r = diameter / 2 (the radius is half of the diameter)
circle A
A = 63.585 = pi × 4.5² = pi × 20.25
pi = 63.585 / 20.25 = 3.14
C = 28.26 = 2 × pi × 4.5
pi = 28.26 / (2 × 4.5) = 28.26 / 9 = 3.14
circle B
A = 19.625 = pi × 2.5² = pi × 6.25
pi = 19.625 / 6.25 = 3.14
C = 15.7 = 2 × pi × 2.5
pi = 15.7 / (2 × 2.5) = 15.7 / 5 = 3.14
pi is always the same for every circle of any size. it is a natural constant defining the circumference and area of every circle in relation to the actual radius or diameter.
The weight of an object is affected by gravity. Something that weighs 1 pound on earth will weigh 1.08 times that weight on Saturn. If a rock weighs 2 1/2
pounds on Earth, what will the object weigh on Saturn?
Answer:
2.7 lb
Step-by-step explanation:
2x1.08=2.16
1/2x1.08=0.54
2.16
+ 0.54
2.70
2.70 = 2.7
4c divided by 6 + 2a for c= 4 for a =5
Given expression:
[tex] \sf4c \div 6 + 2a[/tex]
Given values:
a = 5c = 4Rule we are going to use:
BODMAS
B = BracketsO = Of OrderD = DivisionM = Multiplication A = AdditionS = SubtractionSolution:
Substitute the variables with their given values and solve using the BODMAS rule[tex] \tt4 \times 4 \div 6 + 2 \times 5[/tex]
[tex] \tt \: \frac{ \cancel4 \times 4}{ \cancel6} + 10[/tex]
[tex] \tt \: \frac{2 \times 4}{3} + 10[/tex]
[tex] \tt \frac{8}{3} + 10[/tex]
[tex] \boxed{ \bf \: \frac{38}{3} }[/tex]
Which of the following is a quadratic function?
A)f(x)=2-7x^2
B)f(x)=4^x
C)f(x)=0x^2+7x-4
D)f(x)=3x+8
Answer:
A.
Step-by-step explanation:
A quadratic equation is raised to a degree of 2. Because there is an [tex]x^{2}[/tex] term, it is considered a quadratic equation.
Answer:
The curve will touch the x-axis at x = 2, but not pass through it.
Step-by-step explanation:
I got it right on my test.
please help
i reallly need it
Answer:
300 in³Step-by-step explanation:
The volume is:
V = Bh, where B- area of base, h - heightFind the area of base, which is the trapezoid:
B = 1/2*(5 + 7.5)*6 = 37.5 in²Find the volume:
V = 37.5*8 = 300 in³if you want to make 1/3 pound hamburger how many can you make from 2 1/2 pounds of ground beef
Answer:
3
Step-by-step explanation:
2 1/2 pounds is equal to one pound.
If you want to make 1/3 pound hamburgers you can make 3 from 1 pound ground beef.
1/3+1/3+1/3=1
Ignore all of my extra work and the words my hand are "after each week (the very top one" and "represents the"
Answer:
Green nails
Step-by-step explanation:
A rhombus is
a parallelogram.
always
sometimes
never
Answer:
Always
Step-by-step explanation:
Rhombi hold all the characteristics of parallelograms and have their own too added on.
Hope that helps!!
please hurry A side of the triangle below has been extended to form an exterior angle of 133°. Find the value of xx.
Solution:
Note that:
x + 108 + (180 - 133) = 180Simplify the equation to find x.
=> x + 108 + (180 - 133) = 180=> x + 108 + (47) = 180=> x + 155 = 180=> x = 180 - 155 = 25°→ x + 108 + (180 - 133) = 180°
→ x + 108 + (47) = 180°
→ x + 155 = 180°
→ x = 180 - 155 = 25°
A sleep study found that the number of hours each person slept was normally
distributed. The study found that the average person slept 8.2 hours with a standard deviation of 0.7 hours.
1. What range of hours of sleep are the 99.7% closest to the mean?
2. The 2.5% of the people who slept the most got more than how many hours
of sleep?
3. The 16% of the people who slept the least got less than how many hours sleep?
Answer:
1. 6.1-10.3
Thats all i know.. hope it helps
If Carly has 3 apples and she eats 2 of them how many apples does she have left
Answer:
SHE HAS ONLY HAS 1 LEFT
Step-by-step explanation:
3 - 2 = 1
Instructions for a craft project say that the length of a piece of red ribbon should be 7 inches less than the length of a piece of blue ribbon. How long is the blue ribbon if the red ribbon is 12 inches?
Answer:
12 inches of red ribbon + 7 inches
therefore the length of a blue ribbon is = 19 inches
Answer:he right
Step-by-step explanation:
Please Help!
Determine the solution to the system of equations graphed below and explain your reasoning in complete sentences. g(x) = -2x - 3 and f(x) = Ix+1I - 4
Answer:
(0,3)
Step-by-step explanation:
It is where the lines intersect
The value of the g(x) is equal to the value of f(x). Then the solution of the equation is at (0, -3).
What is the linear system?A Linear system is a system in which the degree of the variable in the equation is one. It may contain one, two, or more than two variables.
The given expression are as follows
g(x) = -2x - 3 and f(x) = Ix+1I - 4
For the solution of the system, the value of the g(x) is equal to the value of f(x). Then we have
[tex]\begin{aligned} \rm g(x) &= \rm f(x)\\\\\rm -2x - 3 &= \rm x + 1 - 4\\\\-\rm 2x - 3 &= \rm x - 3\\\\\rm 3x &= 0\\\\\rm x &= 0 \end{aligned}[/tex]
Then the g(x) will be
g(x) = -2(0) - 3
g(x) = - 3
Then the solution of the equation is at (0, -3).
More about the linear system link is given below.
https://brainly.com/question/20379472
Zoe invested $5,500 in an account paying an interest rate of 8 1/2% compounded continuously. Aubrey invested $5,500 in an account paying an interest rate of 8 1/4% compounded annually. To the nearest dollar, how much money would Aubrey have in her account when Zoe's money has doubled in value?
Answer:
Audrey will have $10,498.10 when Zoe's money has doubled in value.
General Formulas and Concepts:
Pre-Algebra
Order of Operations: BPEMDAS
BracketsParenthesisExponentsMultiplicationDivisionAdditionSubtractionLeft to RightAlgebra I
Equality Properties
Multiplication Property of EqualityDivision Property of EqualityAddition Property of EqualitySubtraction Property of EqualityAlgebra II
Natural Logs and Exponentials
Compounded Continuously Interest Rate Formula: [tex]\displaystyle A = Pe^{rt}[/tex]
P is the principle amountr is the interest ratet is timeCompounded Annually Interest Rate Formula: [tex]\displaystyle A = P(1 + r)^t[/tex]
P is the principle amountr is the interest ratet is timeStep-by-step explanation:
Step 1: Define
Identify.
Zoe:
P = $5,500
r = 0.085
A = 2P
Aubrey:
P = $5,500
r = 0.0825
Step 2: Find Time
Find time elapsed by using Zoe.
Substitute in variables [Compounded Continuously Interest Rate]: [tex]\displaystyle 2P = 5500e^\big{0.085t}[/tex]Substitute in P: [tex]\displaystyle 2(5500) = 5500e^\big{0.085t}[/tex]Simplify: [tex]\displaystyle 2 = e^\big{0.085t}[/tex]Isolate t term: [tex]\displaystyle \ln 2 = 0.085t[/tex]Isolate t: [tex]\displaystyle t = \frac{\ln 2}{0.085}[/tex]So the time it takes for Zoe to get double her money is approximately 8.15467 years.
Step 3: Find Audrey's Money
Substitute in variables [Compounded Annually Interest Rate]: [tex]\displaystyle A = 5500(1 + 0.0825)^\big{\frac{\ln 2}{0.085}}[/tex]Evaluate: [tex]\displaystyle A = 10498.10[/tex]∴ after the elapsed time of approximately 8.15467 years, Zoe would have made double her money valued at $11,000 and Audrey would have made $10,498.10.
---
Topic: Algebra II
Unit: Logarithmic Functions
Find the perimeter of this semi-circle with radius, r = 31cm. Give your answer rounded to 1 DP
Answer:
97.4cm
Step-by-step explanation:
The radius is 31cm so π x 31= 97.3893 rounded to 1DP is 97.4cm
6. It takes one hour longer to fill the empty pool when only the input pipe is open than it takes to empty the filled pool when only the drain pipe is open. It takes 72 hours to empty the filled pool when both pipes are open. How many hours does it take to fill the empty pool when only the input pipe is open
Using the together rate, it is found that it takes 144.5 hours to fill the empty pool when only the input pipe is open.
What is the together rate?It is the sum of each separate rate.
In this problem:
The input's pipe rate is 1/x.The drain's pipe rate is of 1/(x-1).The together rate is of 1/72.Hence:
[tex]\frac{1}{x} + \frac{1}{x - 1} = \frac{1}{72}[/tex]
[tex]\frac{x - 1 + x}{x(x - 1)} = \frac{1}{72}[/tex]
[tex]x^2 - x = 144x - 72[/tex]
[tex]x^2 - 145x + 72 = 0[/tex]
Which is a quadratic equation with coefficients a = 1, b = -145, c = 72, hence:
[tex]\Delta = b^2 - 4ac = (-145)^2 - 4(1)(72) = 20737[/tex]
[tex]x_1 = \frac{145 + \sqrt{20737}}{2} = 144.5[/tex]
[tex]x_2 = \frac{145 - \sqrt{20737}}{2} = -0.5[/tex]
Time is a positive measure, hence, it takes 144.5 hours to fill the empty pool when only the input pipe is open.
More can be learned about the together rate at https://brainly.com/question/25159431
These questions are so confusing. Please help. You get 15 points.
Answer:
13,260.22 mm²
Step-by-step explanation:
the area of the shaded region is the area of the larger circle minus the area of the smaller one
to find the area of the larger we will use half of 62 plus 41 as the radius:
Area (larger) = 3.14(72)²
= 16,277.76
Area (smaller) = 3.14(31)²
= 3,017.54
Area (shaded region) is 16277.76 - 3017.54 = 13,260.22 mm²
The cable company withdraws $67 per month from Denise's checking account
for automatic bill payment. There was $250.75 in Denise's checking account at
the beginning of the year, and no other deductions or additions were made to
the account. How much money is in the account after two months?
Answer: 116.75
Step-by-step explanation: Since $67 is being withdrawn from her checking account EACH month the equation would be $250.75 - 67x.
We already know the value of "x" (2) so we plug that in.
250.75 - 67(2)
Now we multiply and subtract.
250.75 - 134
116.75
The recipe uses 5/8 oz of simple syrup for 1/4 pint of tea. Find the unit rate in oz per pint
Answer:
The recipe uses 5/8 oz of simple syrup for 1/4 pint of tea. Find the unit rate in oz per pint
Step-by-step explanation:
The recipe uses 5/8 oz of simple syrup for 1/4 pint of tea. Find the unit rate in oz per pint
I WILL GIVE BRAINLIEST PLEASE ANSWER CORRECTLY Mr. and Mrs. Bailey hope to send their son to college in eleven years. How much money should they invest now at an interest rate of 9% per year, compounded continuously, in order to be able to contribute $7500 to his education? Do not round any intermediate computations, and round your answer to the nearest cent.
Mr. and Mrs. Bailey need to invest $2906.50 for eleven years so as to be able to contribute $7500 their son education.
Compound interestCompound interest is given by:
[tex]A=P(1+\frac{r}{n})^{nt}[/tex]
where A is the final amount, P is principal, r is the rate and n is the times compounded per year, t is the time
Given that t = 11, n = 1, r = 9% = 0.09, A = $7500 . Hence:
[tex]7500=P(1+\frac{0.09}{1} )^{1*11}\\\\P=\$2906.50[/tex]
Mr. and Mrs. Bailey need to invest $2906.50 for eleven years so as to be able to contribute $7500 their son education.
Find out more on Compound interest at: https://brainly.com/question/24924853
HELP PLEASE JUST THIS QUESTION/ ILL GIVE BRAINLIEST IF CORRECT
Answer:
She earned $288 this week
Step-by-step explanation:
x = 12
Work = 2(12) + 8
24 + 8 = 32 hours
Earned = (12) - 3 = 9 per hour
32 × 9 = $288
I hope this helps!
help pls its attached as a file
Find the value of x
Answer:
85 degrees
Step-by-step explanation:
7: 180 - 52 - 43 = 85 degrees
Can you guys please help me slove this question? 6w-15w-19=91
Answer:
-12.2 rounded
Step-by-step explanation:
Combine like terms.
Move constants to one side of equal sign
divide
6w-15w-19 =91 combine like terms
-9w-19 = 91 add 19 to both sides
-9w = 110 divide by -9
w = -12.2 repeating or 12.2
Find the values of x and y. Write your answers in simplest form
Answer:
x = 12√3
y = 12
Step-by-step explanation:
=>> x/24 = perpendicular/hypotenuse
=>> x/24 = sin 60°
=>> x/24 = √3/2
=>> x = 24√3/2
=>> x = 12√3
now the value of y
=>> y/24 = cos 60°
=>> y/24 = 1/2
=>> y = 12
PLEASE HELP!!!
41. A bag contains 13 red marbles, 12 green marbles and 5 blue marbles. If you mix up the
marbles and pull one out at random, what is the probability that it will be blue? (Answer,
of course, as a fraction in lowest terms.)
Answer:
Number of red marbles = 13
Number of green marbles = 12
Number of blue marbles = 5
Total Number of marbles = 13+12+5
Total Number of Marbles = 30 marbles
[tex] \bf \: probability \: of \: blue \: marbles \: = \frac{number \: of \: blue \: marbles}{total \: number \: of \: marbles} [/tex]
[tex]\sf \dashrightarrow \: probability \: of \: blue \: marble = \frac{5}{30} \\ \\ \sf \dashrightarrow \: probability \: of \: blue \: marble = \cancel \frac{5}{30} \\ \\ \sf \dashrightarrow \: probability \: of \: blue \: marble = \frac{1}{6} [/tex]
So, the probability of blue marbles would be ⅙ .
Answer:
1/6 chance of getting blue
Step-by-step explanation:
find your total (30) that will be your denominator
the number of blue marbles will be your numerator (5)
then simplify 5/30 to 1/6
Find t′(x) from t(x)=√(−3x−7) using the definition of a derivative.
By definition of the derivative,
[tex]\displaystyle t'(x) = \lim_{h\to0} \frac{t(x+h) - t(x)}h[/tex]
[tex]\displaystyle t'(x) = \lim_{h\to0} \frac{\sqrt{-3(x+h)-7} - \sqrt{-3x-7}}h[/tex]
Rationalize the numerator by multiplying the fraction uniformly by its conjugate:
[tex]\displaystyle t'(x) = \lim_{h\to0} \frac{\sqrt{-3(x+h)-7} - \sqrt{-3x-7}}h \times \dfrac{\sqrt{-3(x+h)-7} + \sqrt{-3x - 7}}{\sqrt{-3(x+h)-7} + \sqrt{-3x - 7}}[/tex]
[tex]\displaystyle t'(x) = \lim_{h\to0} \frac{\left(\sqrt{-3(x+h)-7}\right)^2 - \left(\sqrt{-3x-7}\right)^2}{h \left(\sqrt{-3(x+h)-7} + \sqrt{-3x - 7}\right)}[/tex]
[tex]\displaystyle t'(x) = \lim_{h\to0} \frac{(-3(x+h)-7) - (-3x-7)}{h \left(\sqrt{-3(x+h)-7} + \sqrt{-3x - 7}\right)}[/tex]
[tex]\displaystyle t'(x) = \lim_{h\to0} \frac{-3h}{h \left(\sqrt{-3(x+h)-7} + \sqrt{-3x - 7}\right)}[/tex]
[tex]\displaystyle t'(x) = -3 \lim_{h\to0} \frac1{\sqrt{-3(x+h)-7} + \sqrt{-3x - 7}}[/tex]
The remaining limand is continuous at h = 0, so we can substitute h = 0 directly and get a limit/derivative of
[tex]\displaystyle t'(x) = -\frac3{\sqrt{-3(x+0)-7} + \sqrt{-3x - 7}} = \boxed{-\frac3{2\sqrt{-3x-7}}}[/tex]
The rule T⟨4, −1⟩ is used on the preimage point (2, −7). What is the image point?
The image point for the given rule and preimage is (6 - 8)
What is the image point?When we apply a rule T<a, b> to a preimage point (x, y) we get the image (x + a, y + b), so this is like a translation.
So if we apply the rule T<4, -1> to the preimage point (2, -7), the image will be:
(2 + 4, - 7 + (-1)) = (6 - 8)
Concluding, the image point is (6 - 8)
If you want to learn more about translations, you can read:
https://brainly.com/question/2972832
Write 0.0045% as a decimal
Answer:
0.0045%
Step-by-step explanation:
0.0045 is not a fraction so it is a decimal already.
Answer:
0.000045
Step-by-step explanation:
good luck!
1,5,9,13 generalize the pattern by finding the nth term
Answer:
an= a1 +(n-1)*4
Step-by-step explanation:
a1 = 1, a2 =5, a3 = 9, a4= 13,... an= ?
we see that each term is getting bigger so usually that will happen because of addition or multiplication-in our case add 4 to previous term
a1 = 1,
a2 = a1+(2-1) 4 = 1+4 = 5,
a3 = a1 + (3-1)*4 = a1+8 = 1 + 8 = 9,
a4= a1 + (4-1)*4 = a1 + 12 = 1+12= 13,
...
an= a1 +(n-1)*4
Jimmy jogged for a total of 6.8 miles last week. How many feet did Jimmy jog last
week? (1 mile - 5,280 feet)
Answer:
35904 ft
Step-by-step explanation:
We can set up an unit converter to find how many feet Jimmy jogged...
[tex]6.8 mi(\frac{5280ft}{1mi})[/tex]
Note that in this case, the miles (units) cancel out leaving us with:
[tex]6.8*5280ft=35904\ ft[/tex]
