Express as a single logarithm and, if possible, simplify.logb 7x + 8(logb x - logb y)
A. logb 
B. logb 
C. 
D. logb (7x + x8 - y8)
Answer: A
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Solve the problem. Round your answer, if appropriate.As the zoom lens in a camera moves in and out, the size of the rectangular image changes. Assume that the current image is 5 cm × 2 cm. Find the rate at which the area of the image is changing (dA/df) if the length of the image is changing at 0.6 cm/s and the width of the image is changing at 0.1 cm/s.
A. 1.7 cm2/sec B. 6.4 cm2/sec C. 3.2 cm2/sec D. 3.4 cm2/sec
Solve the problem.An estate consisting of a car, a boat, a house, and a collection of rare books must be divided fairly among five heirs. This type of problem is called
A. a discrete fair division problem. B. the method of sealed bids. C. a mixed fair division problem. D. a continuous fair division problem. E. none of these
Solve. Remember to insert units when writing your answer.A carton of phones weighs 44 lb 6 oz. Of this, 2 lb 15 oz is due to packaging. Find the weight of the phones in 
A. 538 lb 11 oz B. 576 lb 14 oz C. 536 lb 3 oz D. 578 lb 6 oz
Write as a percent.8.144
A. 8.144% B. 0.08144% C. 814.4% D. 0.8144%