Homework Help: math

Posted by rozzell on Sunday, September 25, 2011 at 9:12pm.

if you walk for m minutes, the number c of calories used is proportional to the time you walk. if 30 caloris are used when you walk for 12 minutes, write an equation of variation and find the number of calories used when you walk for an hour

math - Reiny, Sunday, September 25, 2011 at 10:24pm
C ∝ t
or
C = kt, where k is a constant
for C=30 , t = 12
30 = k(12)
k = 30/12 = 5/2

C = (5/2)t
so for t=60
C = (5/2)(60) = 150

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