A boy is launching a toy rocket he got for his birthday from the top of an 80 ft building. The function representing the height is f(x) = -16x2 + 64x + 80 where x represents time in seconds.
How long was the rocket in the air?
A)
-1 sec
B)
2 sec
o
5 sec
Eliminate
D)
2.3 sec

The amount of money, in dollars, in an account after t years is given by a = 1000(1.03)^t. the initial deposit into the account was $_^a0 and the interest rate was _a1% per year. only enter numbers in the boxes. do not include any commas or decimal points^t. the initial deposit into the account was $__^a0 and the interest rate is % per year.

Which approach to the theory-and-research cycle does the following sequence reflect: (1) specific observations suggest generalizations, (2) generalizations produce a tentative theory, (3) the theory is tested through the formation of hypotheses, and (4) hypotheses may provide suggestions for additional observations?

What are “like terms”? why can we only add like terms?