Solve the problem.A rock falls from a tower that is 93.1 m high. As it is falling, its height is given by the formula h = 93.1 - 4.9t2.How many seconds will it take for the rock to hit the ground 
A. 4.4 sec
B. 9.6 sec
C. 9.4 sec
D. 1768.9 sec
Answer: A
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Solve the formula for the specified variable.I = 
for R
A. R = 
B. R = kEI
C. R = 
D. R = kE - I
Provide an appropriate response.The following proportion is not true. Change any one of the numbers in the proportion to make it true. 
What will be an ideal response?
Solve the system by elimination.-6x + 7y = 18 2x + 4y = -6
A. ? B. {(-4, 1)} C. {(-3, 1)} D. {(-3, 0)}
Provide an appropriate response.Suppose that you start a business manufacturing and selling computers, and it costs you $8151 to get started. You determine that each computer will cost $1118 to manufacture and you choose to sell each for $2139. Form a system from two equations, assuming 
that is, 
and then solve the system. Round to the nearest whole number.
A. y1 = 8151x + 1118 y2 = 2139x (0, 64,090) B. y1 = 1118x + 8151 y2 = 2139x; (6, 14,859) C. y1 = 1118x + 8151 y2 = 2139x; (8, 17,095) D. y1 = 8151x + 1118 y2 = 2139x; (0, 66,326)