Solve.For a cross-section of pipe with an inside diameter of 4 inches, how much additional material is needed to make the pipe 
inch thick than to make it 
inch thick? Round to the nearest thousandth.
Fill in the blank(s) with the appropriate word(s).
1.914 sq in. of pipe
3/8 = 0.375 1/2 = 0.5
Smaller: D = 4 + (0.375 × 2) = 4.75
A = .7854(D2 - d2) = .7854(22.5625 - 16) = 5.15419
Larger: D = 4 + (0.5 × 2) = 5
A = .7854(25 - 16) = 7.0686
7.0686 - 5.15419 = 1.91441 = 1.914
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Solve the problem.A rock falls from a tower that is 208 feet high. As it is falling, its height is given by the formula 
How many seconds (in tenths) will it take for the rock to hit the ground (h = 0)?
A. 3.6 sec B. 13.9 sec C. 2704 sec D. 14.4 sec
For the points P and Q, find the coordinates of the midpoint of the segment PQ.P(0, -1), Q(8, 8)
A. 
B. (-8, -9)
C. 
D. (8, 7)
Find the product.
A. - 
x2 + 
x + 80
B. - 
x2 - 2x - 2
C. - 
x2 - 32x + 80
D. 
x2 + 
x + 80
Use a calculator to evaluate the expression.(-4.7)12
A. -116,191,483 B. -56.4 C. 56.4 D. 116,191,483