Set up the percent proportion for the application problem. Do not try to solve for any unknowns.In one state, the sales tax is 9%. On one purchase, the tax was $84. Find the cost of the item purchased.
A. 
= 
B. 
= 
C. 
= 
D. 
= 
Answer: A
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Determine whether 149,857 is divisible by 4. ?
A. yes B. no
Solve the problem.When exposed to ethylene gas, green bananas will ripen at an accelerated rate. The number of days for ripening becomes shorter for longer exposure times. Assume that the table below gives average ripening times of bananas for several different ethylene exposure times.
Plot the data and then find a line approximating the data. With the aid of this line, determine the rate of change of ripening time with respect to exposure time. Round your answer to two significant digits.
A. 
5.6 days
B. 
-0.14 day per minute
C. 
38 minutes
D. 
-6.7 days per minute
Write an equivalent double integral with the order of integration reversed.
A. 
B. 
C. 
D. 
Multiply.(970)(524)
A. 508,290 B. 508,280 C. 508,380 D. 508,270