Question

The cost, C, to produce b baseball bats per day is modeled by the function C(b) = 0.06b^2 – 7.2b + 390. What number of bats should be produced to keep costs at a minimum?
27 bats
60 bats
174 bats
390 bats

Answer 1

first coordinate of the vertex is \(-\frac{b}{2a}\) which in your case is
\[-\frac{-7.2}{2\times .06}\] whatever that is

Answer 2

ok

Answer 3

use a calculator

Answer 4

or don't
\[\frac{7.2}{.12}=\frac{720}{12}=60\]

Answer 5

thank you! :)

Answer 6

yw