The total cost in $ of manufacturing 'm' treadmills is given by the function c(m)=m^3-20m^2+500m+100. What's the cost of 2 treadmills?

2015-08-25 6:16 pm

回答 (4)

2015-08-25 6:32 pm

✔ 最佳答案

Set m = 2

c(2) = (2)^3 - 20*(2)^2 + 500*(2) + 100

= 8 - 80 + 1000 + 100

= -72 + 1000 + 100

= 28 + 1000

= 1028

So 2 treadmills cost $1,028.

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2016-02-29 1:05 pm

Cost, c(m) = m^3-20m^2+500m+100 Average cost = c(m)/m = m^2 - 20m + 500 + 100/m

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2015-08-25 6:37 pm

replace m with 2 in this expression and evaluate it

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2015-08-25 6:36 pm

To find the cost of 2 treadmills, set m equal to 2 and find c(2) :

C(2) = 2^3 - 20 * 2^2 + 500 * 2 + 100

C(2) = $1028

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