Write the number in scientific notation.
?
One micron (millionth of a meter): 0.00001937 inch.
?
A. 1.937 × 102 in
B. 0.00001937 × 104 in
C. 1.937 × 10-5 in
D. 1.937 × 103 in
E. 1.937 × 10-4 in
Answer: C
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Solve the equation. If there are no real solutions, write "no real-number solutions."x2 + 4 = 125
A. ±11 B. ±10 C. 11 D. no real-number solutions
Solve the problem.A bridge is built in the shape of a semielliptical arch. It has a span of 104 feet. The height of the arch 28 feet from the center is to be 8 feet. Find the height of the arch at its center.
A. 8.31 feet B. 9.49 feet C. 14.86 feet D. 28.34 feet
Simplify the expression.(x + 8)(x - 8)(4x + 2)
A. 4x3 + 2x2 + 256x + 128 B. 4x3 + 66x2 + 288x + 128 C. 4x3 - 62x2 + 224x + 128 D. 4x3 + 2x2 - 256x - 128
Solve the variation problem.The distance it takes to stop a car varies directly as the square of the speed of the car. If it takes 112 feet for a car traveling at 40 miles per hour to stop, what distance is required for a speed of 
per hour?
A. 204.46 feet B. 204.12 feet C. 216.42 feet D. 174.96 feet