Question 511153
a) Let x be the number of daily minutes and f(x) is the function (number of ounces of fluid):

f(x) = w/2 + 0.4x where w is the weight.

If w = 150 lbs then 

f(x) = 150/2 + 0.4x = 75 + 0.4x

b) If the f(x) = 89 oz

0.4x + 75 = 89
0.4x = 89 - 75
0.4x = 14
x = 14/0.4
x = 35 oz of fluid
John10:)