Solve the problem.A domed ceiling is a parabolic surface. For the best lighting on the floor, a light source is to be placed at the focus of the surface. If 3 m down from the top of the dome the ceiling is 16 m wide, find the best location for the light source.
A. 21.3 m down from the top
B. 10.6 m down from the top
C. 5.3 m down from the top
D. 15.9 m down from the top
Answer: C
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Perform the indicated operation without the use of a calculator and express each answer in decimal notation.
A. 60,000 B. 0.06 C. 0.00001667 D. 0.0006
Find the value of the indicated variable for the values given.A = 
(b + B)h; determine h when A = 88, b = 12 and B = 10
A. 8 B. 11 C. 66 D. 120
Multiply.(12)(-11)
A. -144 B. -132 C. -232 D. -1320
Solve.The slope of the line joining the points 
and 
is 
. Interpret this slope.
A. For every 5 units of increase in x, y will decrease by 1 unit. B. For every 1 unit of increase in x, y will decrease by 5 units. C. For every 1 unit of increase in x, y will increase by 5 units. D. For every 5 units of increase in x, y will increase by 1 unit.