Solve the problem.The sum of a student's three scores is 196. If the first is 15 points more than the second, and the sum of the first two is 13 more than twice the third, what was the first score?
A. 46
B. 75
C. 61
D. 60
Answer: B
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Solve the problem.An arch for a bridge over a highway is in the form of a semiellipse. The top of the arch is 30 feet above ground (the major axis). What should the span of the bridge be (the length of its minor axis) if the height 27 feet from the center is to be 10 feet above ground?
A. 28.64 ft B. 162 ft C. 57.28 ft D. 45.88 ft
Approximate the natural logarithm with a scientific calculator. Round to four decimal places.ln 0.988
A. 0.0052 B. -0.0052 C. 0.0121 D. -0.0121
Simplify the radical.
A. |2x - 11| B. -2x + 11 C. 2x - 11 D. -|2x - 11|
Use a calculator to approximate the expression. Write your answer in scientific notation, and round to the nearest tenth as needed.(2.8 × 105)(2.9 × 107)
A. 81 × 1035 B. 8.1 × 1012 C. 81 × 1012 D. 8.1 × 1035