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pashok25 [27]
3 years ago
15

A cell phone company charges a monthly rate of $10.00 and $0.20 a minute per call. Write an equation that can be used to determi

ne the number of minutes, m, of calls made if the bill for one month is $30.
Mathematics
1 answer:
Aleks04 [339]3 years ago
3 0

Answer:

y = 0.20m + 10, 100 minutes

Step-by-step explanation:

Equation: y = mx + b

Fill it in.

m = slope = 0.20

b = y-intercept = 10

y = 0.20x + 10 (They wanted the variable to be m. So, changing that.)

y = 0.20m + 10

Fill in.

30 = 0.20m + 10

Solve.

20 = 0.20m

100 = m

She was on the phone for 100 minutes.

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A rectangular tank that is 5324 ft cubed with a square base and open top is to be constructed of sheet steel of a given thicknes
marishachu [46]

Answer:

Side of 22 and height of 11

Step-by-step explanation:

Let s be the side of the square base and h be the height of the tank. Since the tank volume is restricted to 5324 ft cubed we have the following equation:

V = s^2h = 5324

h = 5324 / s^2

As the thickness is already defined, we can minimize the weight by minimizing the surface area of the tank

Base area with open top s^2

Side area 4sh

Total surface area A = s^2 + 4sh

We can substitute h = 5324 / s^2

A = s^2 + 4s\frac{5324}{s^2}

A = s^2 + 21296/s

To find the minimum of this function, we can take the first derivative, and set it to 0

A' = 2s - 21296/s^2 = 0

2s = 21296/s^2

s^3 = 10648

s = \sqrt[3]{10648} = 22

h = 5324 / s^2 = 5324 / 22^2 = 11

4 0
3 years ago
Write the percent as a decimal.<br> 1. 66.7%
Sever21 [200]

Answer:

66.7% = 0.667 in decimal form.

Hope that helps!

7 0
3 years ago
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Please help 16 points
Murljashka [212]
16 because 36 divided by 9 is 4 so you have to multiply the 4 x 4
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A research center poll showed that 83​% of people believe that it is morally wrong to not report all income on tax returns. What
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A farmer harvested some of his pecan crops on Friday and Saturday.what fraction of the pecan crop was harvested in two days
Sloan [31]

Answer:

Hence the 3.28 %or 2/61  of total work will be done .

Step-by-step explanation:

Given:

The pecan crops are harvested for  friday and saturday (2days)

To find :

What fraction these 2 days corresponds to the harvesting days?

Solution;

The  pecan crops are growing in America  in state of Georgia

and consider that in months of October and November  pecan crop becomes mature .

Hence the harvesting period is of 2 months considerably .

The month of October and November days are 31 and 30 .

Hence the Total days  of harvesting are 61 days.

In these days total Pecan crops will be harvested.(100% work in 61 days)

Now the farmer harvest for 2 days only .

Required fraction=2/61

=0.0327869

=3.28%

Depending upon the crop field and planting answer will vary

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3 years ago
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