Answer:
2
Step-by-step explanation:
Are you really asking this?
<span>Critical points are where the derivative is 0, i.e. where it crosses the x - axis
The Critical points lies where the derivative is 0, while it crosses the x-axis, SO, in this case the choice 3 looks like best answer for this.
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D = adult
c = child
t = total admission cost
t = 8d + 5c
t = 8(2) + 5(3) = $31
