Solve the problem.A spring on a horizontal surface can be stretched and held 0.5 m from its equilibrium position with a force of 40 N. How much work is done in stretching the spring 2 m from its equilibrium position?
A. 80 J
B. 160 J
C. 40 J
D. 320 J
Answer: B
Mathematics
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Use the formula for the general term (the nth term) of a geometric sequence to find the indicated term of the sequence with the given first term, a1, and common ratio, r.Find a8 when a1 = 3000, r = 
.
A. 
B. 
C. 
D. 
Mathematics
Find the mean for the given sample data.The Cane brothers spent these amounts on groceries over the last eight weeks:
What was the mean amount spent? Round your answer to the nearest cent.
A. $59.19 B. $82.71 C. $78.92 D. $67.65
Mathematics
Find the integral.
dx
A. 16x2 B. 32 + C C. 0 D. 32x + C
Mathematics
Evaluate the trigonometric function. Round your answer to four decimal places. (Be sure the calculator is set in the correct angle mode.) ? sec 221° ?
A. -1.3250 B. -1.0250 C. -0.8250 D. -0.9250 E. -1.2250
Mathematics