Find the circumference of the circle whose radius or diameter is given. Use 
or 
as indicated. d = 91 km. Use ? ? 3.14.
A. C ? 142.87 km
B. C ? 571.48 km
C. C ? 26,002.34 km
D. C ? 285.74 km
Answer: D
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Perform the indicated operations, expressing the answer in simplest form with rationalized denominators.
A. 2
B. 2x2y2
C. 2x2y2
D. 4x4y4
Solve the equation. Use natural logarithms. When appropriate, give solutions to three decimal places unless otherwise indicated.ln e7x = 42
A. {294} B. {6} C. {49} D. {35}
Solve the problem.The perimeter of a rectangle is 64 m. If the width were doubled and the length were increased by 5 m, the perimeter would be 100 m. What are the length and width of the rectangle?
A. Length: 19 m; width: 13 m B. Length: 16 m; width: 11 m C. Length: 13 m; width: 19 m D. Length: 16 m; width: 16 m
Simplify the expression.5(w - 7) + 7
A. 5w + 42 B. 5w - 42 C. 5w - 28 D. 5w + 28