A football is punted from a height of 3.5 feet about the
ground with an initial velocity of
45 feet per second. This
situation can be represented by
the function
_h(t)=-16t? +45t+3.5, where t
is the number of seconds
elapsed since the football was
kicked. If the football is caught
at a height of 5.5ft on the ball's
descent, how long was the
football in the air? Round to the
nearest hundredth.

In factoring by grouping, what would you have for step 3 for the following? step 1: x^3 +5x^2 +4x+20 step 2: x^2 (x+5)+4(x+5) step 3: ?

5,600 x 10^3 = a) 560 b) 5,000,600 c) 5,600,000 d) 56,000

2people are trying different phones to see which one has the better talk time. chatlong has an average of 18 hours with a standard deviation of 2 hours and talk-a-lot has an average of 20 hours with a standard deviation of 3. the two people who tested their phones both got 20 hours of use on their phones. for the z-scores i got 1 for the chatlong company and 0 for talk-a-lot. what is the percentile for each z-score?