Find the actual sum.-7.507 + (-6.430)
A. 1.077
B. 48.270
C. -13.937
D. 13.937
Answer: C
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Find the length of the curve.x = 3 sin t - 3t cos t, y = 3cos t + 3t sin t, 0 ? t ? 
A. 
?2
B. 
?
C. 
?2
D. 
?2
Solve. If necessary, round percents to the nearest tenth, dollar amounts to the nearest cent, and all other numbers to the nearest whole.Find the simple interest earned on $8,600 saved for 
years at an interest rate of 4%.
A. $344.00 B. $5,160.00 C. $516.00 D. $3,440.00
Solve the problem.For a cone, the formula r = 
describes the relationship between the radius r of the base, the volume V, and the height h. Find the volume if the radius is 11 inches and the cone is 7 inches high. (Use 3.14 as an approximation for ?, and round to the nearest tenth.)
A. 886.5 cubic in. B. 7978.7 cubic in. C. 126.6 cubic in. D. 80.6 cubic in.
Find the area of the triangle. If necessary, round the answer to two decimal places. 
A. 16.91 B. 6.16 C. 12.31 D. 24.63