Solve the problem.A brick staircase has a total of 18 steps The bottom step requires 107 bricks. Each successive step requires 5 fewer bricks than the prior one. How many bricks are required to build the staircase?
A. 2322 bricks
B. 1161 bricks
C. 2691 bricks
D. 1116 bricks
Answer: B
Mathematics
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Write the number in scientific notation.520,000
A. 5.2 × 104 B. 5.2 × 105 C. 5.2 × 10-4 D. 5.2 × 10-5
Mathematics
Solve the problem.A rectangular Persian carpet has a perimeter of 188 inches. The length of the carpet is 30 inches more than the width. What are the dimensions of the carpet?
A. 64 in., 94 in. B. 32 in., 62 in. C. 62 in., 92 in. D. 79 in., 109 in.
Mathematics
Find the domain and range of the function.f(x) = 9 sin2 x
A. Domain: (-?, ?); range [-9, 9] B. Domain: [0, ?); range: [-9, 9] C. Domain: (-?, ?); range: [0, 9] D. Domain: [0, 9]; range: (-?, ?)
Mathematics
Find the exact solutions to the quadratic equation, using a method of your choice.x2 + 2x - 8 = 0
A. -4, 2 B. 4, 2 C. 4, -2 D. -4, 1
Mathematics