Saturday
April 19, 2014

Homework Help: Math

Posted by Jay on Friday, December 2, 2011 at 3:55pm.

Can someone help me with these questions?

1.What are the maximum and minimum values for Y=28(1.21)^x on the interval 0<x<12?

a) 275.8 and 0
b) 275.8 and 28
c) 249.7 and 28
d) 188.4 and 28

2. For what value of x does the maximum or minimum of f(x)= x^2 +8x + 12 occur? Is the point a maximum or minimum?

a) -2; maximum
b) -6; maximum
c) -4; minimum
d) 4; minimum

3. The monthly revenue for printer ink for a large office supply store is R(x) = -x^2 + 12x + 13, where x is the price of an ink cartidge in dollars and R(x) is in hundreds of dollars. What is the maximum monthly ink revenue?

a)$49
b)$3600
c)$4900
d)%12, 100

Thank you~ help needed pls T.T

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