A student drops a penny off a house that is 16 feet tall. If the equation for
height as a function of time is
h(t) = -16t2 + initial height wheret is
time in seconds and h(t) is height in
feet, how many seconds will it take for
the penny to hit the ground?

In trapezoid abcd, ac is a diagonal and ∠abc≅∠acd. find ac if the lengths of the bases bc and ad are 12m and 27m respectively.

The table below shows the approximate height of an object x seconds after the object was dropped. the function h(x)= -16x^2 +100 models the data in the table. for which value of x would this model make it the least sense to use? a. -2.75 b. 0.25 c. 1.75 d. 2.25

On #16 : explain how factoring a trinomial, ax^2+ bx+ c, when a does not equal 1 different from factoring a trinomial when a = 1.