Eleven batteries are hooked in series to provide a 54-V power source. Some of the batteries are 9 V and some are 1.5 V. How many of each type are used?
A. 5 batteries of 1.5-V are used,
8 batteries of 9-V are used.
B. 6 batteries of 1.5-V are used,
5 batteries of 9-V are used.
C. 8 batteries of 9-V are used,
8 batteries of 1.5-V are used.
D. 4 batteries of 9-V are used,
7 batteries of 1.5-V are used.
E. 5 batteries of 9-V are used,
6 batteries of 1.5-V are used.
Answer: E
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A. 
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yards of wire from the spool, how many yards were left?
A. 19 yards
B. 19
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C. 18
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D. 20
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