Solve the problem.West End Florists spent $73,740 this year on delivery costs alone. If total sales were $577,500, what percent of total sales was spent on delivery costs? Round to the nearest tenth of a percent, if necessary.
A. 1.3%
B. 78%
C. 7.8%
D. 12.8%
Answer: D
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Find an upper bound for the magnitude |E| of the error in the approximation f(x, y) ? L(x, y) at the given point over the given region R.
at 
; R: |x| ? 0.1, |y| ? 0.1, |z| ? 0.1
A. |E| ? 25.4811 B. |E| ? 23.521 C. |E| ? 20.5809 D. |E| ? 22.051
Find the volume of the described solid.The base of a solid is the region between the curve y = 5cos x and the x-axis from x = 0 to x = ?/2. The cross sections perpendicular to the x-axis are squares with diagonals running from the x-axis to the curve.
A. 6?
B. 
?
C. 
?
D. 
?
The following table shows the cost C of renting a lakeside cabin and taking your family there on a vacation that is d days long. Find a linear model for the cost as a function of the days spent on vacation. Round your answer to two decimal places, if necessary. d 4 6 8 10 C 471 541 611 681?
A. 
B. ?
C. ?
D. ?
Find the limit of the sequence or determine that the limit does not exist.an = 
A. does not exist B. 1 C. 0 D. 2