Solve the problem.A brick staircase has a total of 14 steps The bottom step requires 101 bricks. Each successive step requires 4 less bricks than the prior one. How many bricks are required to build the staircase?
A. 2100 bricks
B. 1050 bricks
C. 1022 bricks
D. 1778 bricks
Answer: B
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Describe the graph of the polar equation. 8r cos ? + r sin ? = 5
A. Vertical line passing through (8, 0) B. Parabola with vertex (8, 5) opening upward C. Line with slope -8 and y-intercept (0, 5) D. Line with slope 5 and y-intercept (0, 8)
Find the area of the figure.
A. 39
B. 286
C. 13 
D. 13 
Solve the problem.A coil of wire rotating in a magnetic field induces a voltage given by e = 20 sin 
,where t is time in seconds. Find the smallest positive time to produce a voltage of 10
.
A. 2.8 sec B. 3 sec C. 2.8? sec D. 3? sec
Solve the problem.Find a formula for the area of the shaded grey region and express it in factored form.9x
1
A. 9x - 1 B. (9x + 1)(9x - 1) C. (9x - 1)(9x - 1) D. (x + 9)(x - 9)