Solve the problem. Write ratios in lowest terms.A certain lake is 1500 feet deep. A nearby lake is 1400 feet deep. Write the ratio of the first lake's depth to the second lake's depth.
A. 
B. 
C. 
D. 
Answer: D
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Perform the indicated operations.(7x - 8) + (3x + 5)
A. 10x B. 10x - 3 C. 7x D. 10x2 - 3
Find a set of polar coordinates for the point for which the rectangular coordinates are given.(-1, -3)
A. (3.16, 1.25) B. (-3.16, 4.39) C. (-3.16, -1.25) D. (3.16, 4.39)
Solve the problem.Find the value of a retirement savings account paying an APR of 6.2% after 40 years (contributions made at the end of each year, including the last year) when the annual contribution is $1680. Round your answer to the nearest cent.
A. $273,440.44 B. $255,894.95 C. $292,073.75 D. $268,557.57 E. $302,681.19
Solve.The speed of a stream is 6 mph. If a boat travels 94 miles downstream in the same time that it takes to travel 47 miles upstream, what is the speed of the boat in still water?
A. 20 mph B. 12 mph C. 18 mph D. 21 mph