单项选择题

Ms．Rogers bought an electric range on the installment plan．The cash price of the range was$4.00．The amount she paid was$120 down and 12 monthly payments of$28each．（）

A、if the quantity in Column A is greater;
B、if the quantity in Column B is greater;
C、if the two quantities are equal;
D、 if the relationship cannot be determined from the information given.

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单项选择题

If two trains are 120 miles apart and are traveling toward each other at a constant rate of 30 mph and 40 mph，respectively，how far apart will they be exactly 1 hour before they meet？（）

A. 10 miles
B. 30 miles
C. 40 miles
D. 50 miles
E. 70 miles

单项选择题

A time—study specialist has set the production rate for each worker on acerta in job at 22 units every 3 hours．At this rate what is the minimum number of workers that should be put on the job if at least 90 units are to be produced per hour？（）

A. 5
B. 8
C. 12
D. 13
E. 30