Solve the problem.Glenn and Paula want to dig an irrigation channel for their garden. Together it takes them 
to dig an appropriately sized irrigation channel. If Paula can dig the channel by herself in 
how long would it take Glenn to dig the channel by himself? Round to the nearest tenth, if necessary.
A. 1.7 hr
B. 4.3 hr
C. 1.3 hr
D. 3.2 hr
Answer: D
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Provide an appropriate response.100% minus the single discount rate equals the complement of the discount rate.
A. True B. False
Solve the problem.During the first five months of the year, Len earned commissions of $3880, $2490, $2180, $2810, and $2760. If Len must have average monthly earnings of at least $2900 in order to qualify for retirement benefits, what must he earn in the sixth month in order to qualify for benefits?
A. at least $2900 B. at least $3280 C. at least $2836 D. at least $2824
Provide an appropriate response.The cost C of processing exhaust gases so that you remove all but x percent of the pollutants is given by 
Find the values of x for which C < 0. Discuss the meaning of the results.
What will be an ideal response?
Suppose that the average adult in the United States will work x number of days (rounded to the nearest day) to earn enough to pay for all of the household's leisure activities in that year. This number can be calculated by multiplying the average percent of household income spent on leisure activities by 365 (the number of days in a year). The bar graph shows the percent of income spent in various countries of the world. Use the graph to answer the question.
In which country is the highest percent of income spent on leisure activities? What percent is this?
A. USA; 72.1% B. Japan; 24.7% C. China; 94.3% D. USA; 27.9%