2018SP MATH 2413 33422 Marco Cardoso 1 1/17/18 8:41 PM Quiz: Prerequisite Knowle

Question

2018SP MATH 2413 33422 Marco Cardoso 1 1/17/18 8:41 PM Quiz: Prerequisite Knowledge Quiz This Question:1 pt me Remaining 00 30 39 Submit 16 of 17 This Quiz: 17 pls possble Suppose that it costs 3e per minute to park at the arport with the rate dropping to 2e per minute ater 9 pm Find and graph the cost function ct) for values oft satisfying 0 Sts 120 Assume that t is the number of minutes after 8:00 p.m. What is the cost function c(t)? 0.03t #0sts 60 18 i60 sts 120 on0 -06+003 601 120 003 0sts40 0410021 if 40

Explanation / Answer

for 1st 60 s,

C(t) = 0.03*t

At t=60 s, price is 0.03*60 = 1.8

after 60 s,

C(t) = 1.8 + 0.02*(t-60)

= 1.8 + 0.02*t - 1.2

= 0.6 + 0.02*t

This is given by function D

at 120 s, price is 0.6+0.02*120 = 3

graph A is correct

Answer:

D

A

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