Solve the problem.A rock falls from a tower that is 137.2 m high. As it is falling, its height is given by the formula 
How many seconds will it take for the rock to hit the ground 
Round to the nearest tenth, if necessary.
A. 5.3 sec
B. 3841.6 sec
C. 11.7 sec
D. 11.5 sec
Answer: A
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How many seven-digit phone numbers are available in area code 825 if no phone number can begin with 0 and 1? ?
A. 100,000 B. 8,000,000 C. 5,000,000
Express the sum in sigma notation.1 - 4 + 16 - 64 + 256
A. 
4k + 1
B. 
4k
C. 
4k
D. 
Solve the problem.Matt bought 3 pounds of oranges and 2 pounds of apples and paid src="https://sciemce.com/media/4/ppg__file0518192205__f1q71g4.jpg" alt="" style="vertical-align: -15.0px;" />
A. $0.87 per pound
B. $0.74 per pound
C. $0.80 per pound
D. $0.83 per pound
before tax. Andy bought 4 pounds of oranges and 3 pounds of apples and paid 
before tax. Use this information to set up a matrix equation of the form AX = B , which can be solved to determine the price per pound for oranges and apples. Solve this matrix equation to find the price per pound of apples.Use the fact that for 
Solve the inequality algebraically. Express the solution in interval notation.x3 ? 125
A. (-?, 5] B. [5, ?) C. (-?, -5] ? [5, ?) D. [-5, 5]