Solve the problem. Round to the nearest tenth, if necessary.If an object is propelled upward from ground level with an initial velocity of 71.6 feet per second, its height h in feet t seconds later is given by the equation 
After how many seconds does the object hit the ground?
A. 9.0
B. .2
C. 2.2
D. 4.5
Answer: D
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Let Z be the standard normal variable. Find the values of z if z satisfies 
. Round your answer to the nearest hundredth.
?
A. ?
B. ?
C. ?
D. ?
E. ?
Write fraction in lowest terms.A marketing firm develops two different television commercials for a product. To determine which is more effective, the firm conducts an experiment. They randomly select 400 people using the phone directory and pay 200 to watch one of the commercials and the other 200 to watch the other. They then ask the viewers whether they would buy the product. 42 said yes in the first group, while 80 said yes in the second group. Write the lowest-terms fraction for each group.
A. 
, 
B. 
, 
C. 
, 
D. 
, 
Factor completely. If the polynomial cannot be factored, write "prime."8x2 + 6x - 9
A. (8x - 3)(x - 9) B. (8x - 3)(x + 3) C. (4x + 3)(2x - 3) D. (4x - 3)(2x + 3)
Rewrite the logarithmic equation
in exponential form.
a. 
b. 
c. 
d. 
e. 