Answer:
-600
Step-by-step explanation:
4 x 10 x 3 x 5 x -1
40 x 15 x -1
600 x -1 = -600
Element X decays radioactively with a half life of 15 minutes. If there are 340 grams of Element X, how long, to the nearest tenth of a minute, would it take the element to decay to 6 grams?
Answer: 57 min
i used a calculator.
Answer:
t=87.36643 ≈ 87.4 minutes
Step-by-step explanation:
y=a(.5)^{\frac{t}{h}}
y=a(.5)
h
t
y=6 \hspace{15px} a=340 \hspace{15px} h=15 \hspace{15px} t=?
y=6a=340h=15t=?
6=340(.5)^{\frac{t}{15}}
6=340(.5)
15
t
\frac{6}{340}=\frac{340(.5)^{\frac{t}{15}}}{340}
340
6
=
340
340(.5)
15
t
0.0176471=(.5)^{\frac{t}{15}}
0.0176471=(.5)
15
t
\log(0.0176471)=\log((.5)^{\frac{t}{15}})
log(0.0176471)=log((.5)
15
t
)
\log(0.0176471)=\frac{t}{15}\log(.5)
log(0.0176471)=
15
t
log(.5)
Power Rule.
15\log(0.0176471)=t\log(.5)
15log(0.0176471)=tlog(.5)
Multiply by 15.
\frac{15\log(0.0176471)}{\log(.5)}=\frac{t\log(.5)}{\log(.5)}
log(.5)
15log(0.0176471)
=
log(.5)
tlog(.5)
Divide by log(.5).
t=\frac{-26.299915}{-0.30103}
t=
−0.30103
−26.299915
t=87.36643\approx 87.4 \text{ minutes}
t=87.36643≈87.4 minutes
i need help with my home work
Answer:
I would say 3
Step-by-step explanation:
ABC is a scaled down triangle of AED
Have an amazing day!
Please rate!
Answer the following correctly :-)
Can somebody help me please
Answer:
I will help you I. working on it just be pecient
The last time David filled up his truck with gas, he paid $27.44 for 7 gallons. This time, he needs 15 gallons. If the price is the same, how much will he pay?
help
Answer:
58.8
Step-by-step explanation:
Because when he paid for it the first time he got 3.92$ per gallon so if you times 3.92 x 15 that's how much he is going to pay.
Hope it helps have a great afternoon:)
pls give brainliest
ignore ignore ignore ignore ignore ignore ignore ignore ignore ignore ignore ignore ignore ignore ignore ignore ignore ignore ignore ignore ignore ignore ignore ignore ignore ignore ignore ignore ignore ignore ignore ignore ignore ignore ignore ignore ignore ignore ignore ignore ignore ignore ignore ignore ignore ignore ignore ignore ignore ignore
The relation shown in the table represents what a local electrician charges each hour of work. The electrician charges 30$ service fee and then 25$ for each hour he worked
(Identifie independent variable)
Using it's concept, it is found that the independent variable is the number of hours worked.
What is the relation between a function and the dependent and independent variables?A function has the following format: y = f(x).
In which each value of y is a function of one value of x, and thus, x is the independent variable and y is the dependent variable.
That is, the input of the function is the independent variable and the output is the dependent variable.
In this problem, the input is the number of hours worked and the output is the salary, hence, the independent variable is the number of hours worked.
More can be learned about independent variables at https://brainly.com/question/1429012
2. Arrange the whole numbers from 1
to 15 in the boxes below so that no
number is repeated and the sum of
the numbers in any two adjacent
boxes is a perfect square.
30. 9, -27, 81, -243, ...
Find the next number
Answer:
729
Step-by-step explanation:
Write the recursive formula through the pattern:
[tex]a_{n+1}=-3a_{n}[/tex]
Find terms of sequence through 9, -27, 81, -243 :
729
I hope this helps you
:)
Plssss will give Brainliest
Answer:
Step-by-step explanation:
The relationship that exists between the length of the hypotenuse and the length of the legs is that the sum of both of the legs lengths squared is equal to the hypotenuse length's squared or in other words, the Pythagorean theorem.
[tex]6^{2} +8^{2} =10^{2}[/tex]
Hope that helps!
Write a story problem to go with the multiplication problem. 5x 3/4 Then solve the problem.
Story : Your mother just bought you 5 pizzas to celebrate your A+ grade :). And you decided to do a challenge your mother told you to : Every minute, you will have to eat 3/4 of a pizza. After 5 minutes, how much of the 5 pizzas did you eat?
Answer : 5 x 3/4 = 15/4
Give the equation of a line which is perpendicular to y = 2x + 1
Shannon’s mom took her to dinner for her birthday. Their dinners totaled $80 and sales tax was 5%. If Shannon’s mom left a 20% tip on the cost of their dinners before tax, how much money did she spend in all?
Answer:
100 dollars.
Step-by-step explanation:
First you multiply 80 by 5% which is 4. Then you multiply 80 by 20% which is 16. Then you add it all together which gives you $100.
The mayor knows the area needed for a flower garden in the park she wants the base to be certain length how can she determine the necessary heifht to get the correct area of the flower garden? Explain
Answer:
If the mayor knows the area and length of the base of the flower garden, she can divide the area by the length to determine the height
Step-by-step explanation:
Area = Length • Height
divide both sides by Length
Area/Length = Height
Answer:
First, she starts with the formula for area for the specific shape in the problem. Then, substitute the area and the base into the formula. Finally, she can solve the resulting equation for the height.
Sorry i'm really late with a answer but i hope it helps people
:)
Factorise 5x+10x(b+c)
Answer:
Answer attached
Step-by-step explanation:
hope u understand
Can you solve... 4(-6g-10h)+3h-4(-3h-10g)
Answer:
16g - 28h
Step-by-step explanation:
4 ( -6g - 10h ) + 3h - 4 ( -3h - 10g) = -24g - 40h + 3h +12h + 40g
= 16g - 28h
This is pretty simple, all you need to do is distribute the values from the parenthesis and get simplify the variables
find the measure of each angle indicated (30 points)
Answer:
? = 20°
Step-by-step explanation:
This is if 25 is to the right.
✓a²=a find out ✓a² not Equal a
Answer:
It can't be anything other that a maybe the question is wrong ask a tutor
have a nice day
Step-by-step explanation:
Answer:
√a² = |a|
Step-by-step explanation:
√a² = |a| not a
because the amount of "a" can be negative and when it reaches power 2 the minuse sign converts to plus sign , so we must use absolute value : |a| . notice that the answer never can be negative.
example:
a = -2
√(-2)² = √+4 = |-2| = 2 -2
How do you find the slope intercept form of the equation of the line through the points (-4,2) and (0,-5).
Answer:
[tex]y=-\frac{7}{4} x-5[/tex]
Step-by-step explanation:
How do you find the slope intercept form of the equation of the line through the points (-4,2) and (0,-5).
Slope (m) = [tex]\frac{y_2-y_1}{x_2-x_1}[/tex]
[tex]m=\frac{-5-2}{0-(-4)} =\frac{-5-2}{0+4}=\frac{-7}{4}=-\frac{7}{4}[/tex]
[tex]y = mx + b[/tex]
[tex]y=-\frac{7}{4} x-5[/tex]
*View attached graph to check your answer*
Hope this helps!
trying to make the longest chain of answers dont mess it up. 5X5 is ________
Answer:
5x5=25
Thanks
Sorry, I don't know what you mean by LONGEST CHAIN
plsss plsss plsss help
WILL GIVE 50 POINTS aluate the expression abc for a = –2.1, b = 4, and c = 0.5.
Answer:
-4.2
Step-by-step explanation:
abc means multiplication becuase theyre together so -2.1 x 4 x 0.5 and that equals -4.2.
Answer:
see below for explanation:-
Step-by-step explanation:
[tex]abc[/tex]
a=-2.1,b=4 and c=0.5[tex] - 2.1 \times 4 \times 0.5[/tex]
[tex] - 8.4 \times 0.5[/tex]
[tex] - 4.2[/tex]
The initial amount of the function is 11, and then it decreases by a factor of 5/8
with each unit increase in x.
The function that describes the situation is y = ?
The linear function that represents the situation where is expressed as: y = 5/8x + 11.
What is a Linear Function?Given a relation that has initial value as b and m as the unit rate, a linear function that represents the relation is expressed as: y = mx + b.
Given:
Unit rate = m = 5/8Initial value = b = 11Substitute the values into y = mx + b.
y = 5/8x + 11
Thus, the linear function that represents the situation where is expressed as: y = 5/8x + 11.
Learn more about linear function on:
https://brainly.com/question/15602982
A. The electric clothes dryer you are interested in buying costs $300 with tax.
It uses $0.50 of electricity for one hour of drying.
What is the rate of electric use (slope)?
B. What is your beginning cost (y-intercept)?
C. Write this as a linear equation in y = mx + b form.
Answer:
A. 0.5/hour
B. 300
C. y=0.5x+300
What is the remainder when
1234
×
5678
is divided by 5?
Answer:
4
Step-by-step explanation:
Because when 1,234 is x by 5,6780=7 million,6thousand and 652 so when that is divided by 5 it=1,401,330 with r 4.
Hope this helps have a great afternoon:)
Answer:
2
Thanks!
Answered by: FieryAnswererGT
#learnwithbrainly
Jamil traveled 210 miles, which is 70% of the total distance to his grandfather's house.
How many more miles does Jamil need to travel to reach his grandfather's house?
Step-by-step explanation:
210 of 70%
or,210×70/100
or,147
if 3 cubic centimeters fill the botton layer of a box and the box fits 6 layers what is the volume of the box
Answer: The volume is 2 because 3/6 equals 2
Step-by-step explanation: you would do 3/6 which equals 2.
What is the difference between vertical and perpendicular?.
Answer:
Vertical is straight up and down line or object
Perpendicular is more at an angle of 90 degrees to a line, plane, or surface ect
Sally bought 3 popcorns for a total of 18 dollars. How much does each box cost? Write an equation to solve the problem with c as your variable.
1 c+18=6
2 3c=18
3 18c=6
4 c+6=18
Answer:
Answer may be c+18=6
Step-by-step explanation:
If you reverse the equation to 18/3 you will get 6
Michelle bought five packs of crayons for $16.25 What is the cost of a pack of crayons, in dollars, if all the packs cost the same?
Answer:
Michelle bought a pack of crayon for $3.25
Step-by-step explanation:
Number of packs = 5
The cost of a pack of crayons =
(Cost of 5 packs of crayon) / (number of packs of crayons)
The cost of a pack of crayons = ($16.25 ) / 5
The cost of a pack of crayons = $16.25 / 5
The cost of a pack of crayons = $3.25
What do linear pairs make