Rewrite the series using summation notation. Use 1 as the lower limit of summation.
+ 
+ 
+ . . . + 
A. 
B. 
C. 
D. 
Answer: C
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Solve the problem.Find the optimum number of batches (to the nearest whole number) of an item that should be produced annually (in order to minimize cost) if 60,000 units are to be made, it costs $2 to store a unit for one year, and it costs $520 to set up the factory to produce each batch. Assume that units of this item will be sold off throughout the year, so the cost equation will use the average cost.
A. 8 batches B. 11 batches C. 13 batches D. 10 batches
Use a calculator (in radian mode) to evaluate the given expression.cos-1 0.8910
A. 1.0995 B. 0.6286 C. 27.0008 D. 0.4713
Solve the problem.On the October 15 billing date, Jacob had a balance due of $292.31 on his credit card. The transactions during the following month were: 
The interest rate on the card is 1.3% per month. Using the average daily balance method, find the balance due on November 15 (October has 31 days).
A. $606.82 B. $607.71 C. $606.81 D. $606.71
Provide an appropriate response.Solve the equation: 5x - 2x = 21
A. x = -7 B. x = 7 C. x = -3 D. x = 3