Re: [計量] 請教幾題
※ 引述《cyndilin (cyndi)》之銘言：
: 數學太爛了，想請教各位這幾題要怎麼算，
: 謝謝~~
: In November the Smythe household used the same total amount of electricity as
: in July, but the water heater used 33 percent of this total amount. By
: approximately what percent did the amount of
: electricity used by the water heater increase from July to November?
: (A) 13%
: (B) 33%
: (C) 50%
: (D) 65%
: (E) 130%
有圖嗎@@? 好像條件不夠
: The electricity used by the water heater was
: measured separately and its cost per kilowatt-hour was one-half the cost per
: kilowatt-hour of the rest of the
: electricity used. The cost of the electricity used by the water heater was
: most nearly what fraction of the total cost of all the electricity used?
: (A) 1/11
: (B) 1/9
: (C) 1/8
: (D) 1/5
: (E) It cannot be determined from the information
: given.
好像也條件不夠? E?
: The measures of two angles of a parallelogram
: differ by 52 degrees. The number of degrees in the smaller angle is
: (A) 38
: (B) 52
: (C) 64
: (D) 76
: (E) 128
a+b=180
a-b=52
b=64
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