The function f(t) = -16t2 + 32t +42 gives the height h (in feet) of water from a fountain t seconds after it leaves the spout. When does the water reach its maximum height? What is the maximum height?

answer: the answer is 23

step-by-step explanation:

expression #3 is not equivalent. the others are.

on monday rodney ate 1/4th of the sandwich = 3/12

on tuesday he ate 1/3rd of the sandwich = 4/12

therefore in total he has eaten = 3/12 + 4/12 = 7/12

thus we can say that he has eaten 7/12 of the sandwich on monday and tuesday alltogether.

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