Use modular arithmetic to find the answer.Find all x such that x ? 3 (mod 7).
A. x = 7 + 7k, where k is an integer
B. x = 3 + 11k, where k is an integer
C. x = 3 - 7k, where k is an integer
D. x = 3 + 7k, where k is an integer
Answer: D
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Find the requested measurement. Use ? ? 3.14 and round your answer to the nearest hundredth.Find the area of the circle.
A. 43.96 cm2 B. 21.98 cm2 C. 153.86 cm2 D. 38.47 cm2
Provide an appropriate response.Change 
to a percent equivalent.
A. 62.5% B. 78% C. 1.6% D. 0.625%
Solve the problem. Round your answer to the nearest tenth.The roof of a building is in the shape of the top half of the hyperbola y2 - x2 = 21, where x and y are in meters. Refer to the figure and determine the distance, w, between the two outside walls. 
a = 9.0 m b = 9.0 m
A. 15.5 m B. 10.1 m C. 7.8 m D. 60.0 m
Find the percent error between the indicated approximation and the actual value of the integral.
; Sn, n = 4
A. 5.66% B. 0.59% C. 0.57% D. -0.56%