Solve the problem.Find the area A and circumference C of a circle of diameter 20 mi. Use 3.14 for ?. Round the result to the nearest tenth.
A. A = 314 mi2; C = 62.8 mi
B. A = 1256 mi2; C = 31.4 mi
C. A = 125.6 mi2; C = 31.4 mi
D. A = 62.8 mi2; C = 62.8 mi
Answer: A
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Graph the function in the ts-plane (t-axis horizontal, s-axis vertical). State the period and symmetry of the function.s = -cot 4t
A. Period ?, symmetric about the origin
B. Period 
, symmetric about the origin
C. Period 
, symmetric about the s-axis
D. Period 
, symmetric about the origin
Use factoring to solve the equation.3x2 - 23x = 8
A. -3, 8
B. - 
, -3
C. - 
, 8
D. - 
, 3
Write an expression in completely factored form for the area of the shaded figure.
A. (x + 4)2 B. (x + 2)(x - 2) C. (x - 4)2 D. (x + 4)(x - 4)
Use your estimation skills to pick the most reasonable answer. Do not solve the problem.333.89 - 332.53
A. 1.36 B. 136 C. 13.6