Each of the functions shown represents the height (in feet)
of a rocket t seconds after being fired.
h(t) = –16(t – 5)2 + 576
h(t) = –16(t + 1)(t – 11)
What is the initial height of the rocket above the ground?

1. according to the internal revenue service, the mean tax refund for the year 2007 was $2,708. assume the standard deviation is $650 and that the amounts refunded follow a normal probability distribution. a. what percent of the refunds are more than $3,000? b. what percent of the refunds are more than $3,000 but less than $4,000? c. what percent of the refunds are less than $2,000?