Solve.A boat can go 105 miles per hour in still water. It takes as long to go 630 miles upstream as it does to go downstream 720 miles. How fast is the current?
A. 1 mph
B. 9 mph
C. 6 mph
D. 7 mph
Answer: D
You might also like to view...
Provide an appropriate response.Markup represents the amount of the selling price needed to cover operating expenses and overhead.
A. True B. False
Solve the problem. If the base of the log is not specified, assume that it is 10.The sales of a new product (in items per month) can be approximated by 
, where t represents the number of months after the item first becomes available. Find the number of items sold per month 33 months after the item first becomes available.
A. 5225 items per month B. 1225 items per month C. 112,500 items per month D. 10,225 items per month
Find the sum of the infinite geometric series, if it exists.-12 - 4 - 
- 
- . . .
A. does not exist
B. - 18
C. 6
D. - 
Solve the problem.The rate of expenditure on a particular machine is given by dM/dx = 9x
, where x is time measured in years. Maintenance costs for the second year are $74. Find the total maintenance function, M.
A. M = 3(x2 + 5)3/2 + 65 B. M = 9(x2 + 5)3/2 - 7 C. M = 9(x2 + 5)3/2 + 65 D. M = 3(x2 + 5)3/2 - 7