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September 23, 2014

September 23, 2014

Posted by **lindsey** on Sunday, May 1, 2011 at 12:57pm.

a. Write an expression that gives the cost(C) to test animals.

b. you can find the average cost per animal by dividing total costs by number of animals. Write the equation that gives the average cost (AC) per animal.

c. Find the average cost for 20 animals.

d. Find the average cost for 200 animals.

e. Find the average cost for 2000 animals.

f. How many animals should be tested for the average cost to be $5.00 per animal?

- math -
**Henry**, Monday, May 2, 2011 at 10:57pma. C = 4X + 3000.

b. AC = (4X + 3000) / X.

c. AC = (4*20 + 3000) / 20 = $154.

d.

e.

f. AC = (4X + 3000) / X = $5.00,

Multiply both sides by x:

4X + 3000 = 5X,

5X - 4X = 3000,

X = 3000 Animals.

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