Kala purchased a prepaid phone card for $25. Long distance calls cost 8 cents a minute using this card. Kala used her card only once to make a long distance call. If the remaining credit on her card is $21.48, how many minutes did her call last?

Answer:

C.

Step-by-step explanation:

Answer:

C

Step-by-step explanation:

All of the others are equal to .06,.11, and .875 so its C

Answer:

s=1

Step-by-step explanation:

9s-4s=13-8

5s=5

s=1

Answer:

32

Step-by-step explanation:

18+14

Answer:

0.32653061224

Step-by-step explanation:

To write 0.32653061224 as a fraction you have to write 0.32653061224 as numerator and put 1 as the denominator. Now you multiply numerator and denominator by 10 as long as you get in numerator the whole number.

0.32653061224 = 0.32653061224/1 = 3.2653061224/10 = 32.653061224/100 = 326.53061224/1000 = 3265.3061224/10000 = 32653.061224/100000 = 326530.61224/1000000 = 3265306.1224/10000000 = 32653061.224/100000000 = 326530612.24/1000000000 = 3265306122.4/10000000000 = 32653061224/100000000000

And finally we have:

0.32653061224 as a fraction equals 32653061224/100000000000

Answer:

Part 1: [tex]P(t)=3(1.4142)^t[/tex]

Part 2: There are 24 people infected

Part 3: P(48)=50,331,648

More than 50 million people are infected after 2 days

Step-by-step explanation:

Exponential Growth

The natural growth of some magnitudes can be modeled by the equation:

[tex]P(t)=P_o(1+r)^t[/tex]

Where P(t) is the actual amount of the magnitude, Po is its initial amount, r is the growth rate and t is the time.

We know the Zika virus started with Po=3 people infected. The number of people infected doubles every 2 hours, which means that for t=2 hours, P(2)=6, thus:

[tex]6=3(1+r)^2[/tex]

Dividing by 3:

[tex](1+r)^2=2[/tex]

Solving for 1+r:

[tex]1+r=\sqrt{2}[/tex]

1+r=1.4142

Part 1:

The equation to model the situation is:

[tex]\boxed{P(t)=3(1.4142)^t}[/tex]

Part 2:

After t=6 hours:

[tex]P(6)=3(1.4142)^6[/tex]

P(6)=24

There are 24 people infected

Part 3:

After 2 days, t=2*24 = 48 hours:

[tex]P(48)=3(1.4142)^48[/tex]

P(48)=50,331,648

More than 50 million people are infected after 2 days

Answer:

-6.26°C

Step-by-step explanation:

Given that:

Initial temperature = - 14.96ºC

Temperature change per hour = 2.9ºC

Hence, the temperature of the solution after 3 hours can be obtained thus :

Final temperature = (initial temperature + (temperature change per hour * Number of hours))

Temperature after 3 hours :

-14.96 + 2.9(3)

-14.96 + 8.7

= - 6.26

Answer:

1. cm

2. mm

3. km

4. mm

5. m

6. ml

7. L

Step-by-step explanation:

may it help you if not forgive me

Answer:

-48-12g

Step-by-step explanation:

Use the distributive property to get your answer

Answer:

-48-12g

Step-by-step explanation:

-12 x 4 = -48

-12 x g = -12g

Put it all together: -48-12g

Answer: He will need 8 gallons of paint for the other murals.

Step-by-step explanation:

Given: 1 gallon of paint was required to create 1 mural.

Since replicates have the same dimensions, i.e same total surface area.

So, if 8 replication need to be made, the quantity of the paint required for this will be

8  x (Quantity required for 1 mural)

= 8 x 1

= 8 gallons

Hence, he will need 8 gallons of paint for the other murals.

Answer:

78

Step-by-step explanation:

Answer:

Step-by-step explanation:

Find the sum of the first 42 terms of the following series, to the nearest integer.

2,7,12

Solution

The sum is given by  

SUM_n=n/2*(a_1+a_n)

a_n=a_1+(n-1)d

a_1=2,   n=42,     d=5

The 42nd term is therefore given by  

a_42=2+(42-1)5=207

SUM_42=42/2*(2+207)=21*209=4389

The sum of the first 42 terms of the series, therefore, is 4389

Answer:

slope of line parallel to given line=slope of given line

=9/2

slope of line perpendicular to given line=‐1/slope of given line

= -2/9

Answer:

50°

Step-by-step explanation:

sin 40° = cos 50°

Hope it helps you in your learning process.

Answer:

10

Step-by-step explanation:

2+12+22+8+6=50

Median =50/5=10

Answer:

b jwtvd vgakdbbfqbbbq8jrbw5rl17rgsndbgwy

Answer:

C. 17 - 15

Step-by-step explanation:

Answer:

Step-by-step explanation:

-9y + 17 is equivalent to the following:

17 - 9y  Only order in which the terms appear is different here

-9(y - 17/9) (This is just a regrouping of -9 + 17)

:0 ur welcome

brainliest plz

Answer:

y=-2x-4

Step-by-step explanation:

Answer:

x = 45

Step-by-step explanation:

'x' is the hypotenuse or the 'c' in the Pythagorean Theorem (a² + b² = c²)

27² + 36² = c²

729 + 1296 = c²

2025 = c²

√2025 = c

45 = c

Answer:

The maximum revenue Luci Lulu can make selling cookies in one day is $2,000.

The price Luci Lulu should sell the cookies to make the maximum revenue is $1.

Step-by-step explanation:

From the question, we have:

x = −2000p + 4000 ..................... (1)

Where;

x = number of cookies sold

p = price of a cookie, p, and the

Revenue function (R) can therefore be obtained as follows:

R = px ……………………….. (2)

If we substitute equation (1) into (2), we will have:

R = p(−2000p + 4000)

R = −2000p^2 + 4000p ……………… (3)

Differentiating equation (3) with respect to p and set it equal to zero, we have:

−4000p + 4000 = 0

Solving for p, we have:

4000 = 4000p

p = 4000 / 4000

p = 1

Therefore, this implies the price Luci Lulu should sell the cookies to make the maximum revenue is $1.

Substituting p = 1 into equation (3), we have:

R = (−2000 * 1^2) + (4000 * 1)

R = (−2000 * 1) + (4000 * 1)

R = −2000 + 4000

R = 2000

This implies that the maximum revenue Luci Lulu can make selling cookies in one day is $2,000.

Answer:

80 males

Step-by-step explanation:

180 / 9 = 20

20 x 4 = 80

Answer:

the answer is 80 males

Step-by-step explanation:

4(males)+5(females)=9

180(everybody)/9=20

20×4=80 hope this helps

Answer: First off thats not how you ask for help, by calling us "smart math people" that could offend someone...Second off the answer is 10 because

Step-by-step explanation:

A^2 + B^2 = C^2

6^2 + 8^2 = C^2

36 + 64 = 100 square root that = 10

Answer: 10

Answer:

10

Step-by-step explanation:

[tex]a^{2} + b^{2} = c^{2}[/tex] : Pythagorean Theorem

[tex]6^{2} + 8^{2} = c^{2}[/tex] ⇒[tex]36+64=c^{2}[/tex]

[tex]36+64=c^{2}[/tex] ⇒ [tex]\sqrt{100} = \sqrt{c^{2} }[/tex]

10

Answer:

B. 86 degrees

Step-by-step explanation:

Given the following angles:

m∠NOQ = 110

m∠NOP = 24

Using the addition postulate:

m∠NOQ =  m∠NOP + m∠POQ

110 = 24 + m∠POQ

m∠POQ = 110 - 24

m∠POQ = 86

Hence the measure of m∠POQ is 86 degrees

Answer:

B. Anchorage's temperature > Nome's temperature

Step-by-step explanation:

Answer:

x=0

Step-by-step explanation:

∵ △ABC~△AED

∴

[tex] \frac{ AE }{ AB } = \frac{ED}{ BC} \\ \frac{4}{10} = \frac{8}{x + 20 } \\ 4x + 80 = 80 \\ 4x = 0 \\ x = 0[/tex]

Answer:

here!<3

Step-by-step explanation:

A: 9 + 13 + 10 is equal to or less than C

B: 32 is equal to or less than C

Step-by-step explanation:

How I got A:

in order to solve this you have to add 9, 13, and 10.

don't solve it right away, but write every number out individually.

It says in the problem, "Afterward he had AT MOST $10".

With this we know we need a sign other than equal to.

if the amount was at most $10, we need to use equal to or less than.

I chose equal to or less than because it says AT MOST, so the amount he was pain will be equal to, or less than all of then numbers given to us added.

How I got B:

I added 9, 13, and 10.

The sum of these numbers is 32

C is our variable, because we don't know how much they paid him

32 is equal to or less than C

Hope this helps <3

Answer:

Width=9.5, Length=32.5

Step-by-step explanation:

Let x be the width of the rectangle,

The length is 4 feet more than 3 times the width,

The length= 3x+4

The perimeter is

2(x)+2(3x+4)=84

2x+6x+8=84

8x=76

x=76/8

x=9.5

The Width=9.5

Length= 3(9.5)+4=32.5

Answer:

Step-by-step explanation:

P could be the price for working as a dog sitter where you ask for $40 to be payed every time you show to work so you can clean the hair off your clothes at the cleaner after work, plus $22 for every hour t you work .