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百分率增减・折扣与复合变化进阶
A furniture company is selling all tables with a 20% discount off their original price for the month of October. What is the discount, in dollars, on a table with an original price of $170?
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百分率增减・折扣与复合变化进阶
An online store is offering two different discounts on its sweaters: a bulk discount for large orders and a coupon discount. For order of n sweaters, where \( 10<n<50 \), a bulk discount of n% off the original price of $41 is applied to the price of each sweater. If a coupon is applied to the order, a discount of an additional $4 is applied to the price of each sweater, after the bulk discount is applied. For a certain order with both the bulk discount and the coupon discount applied, the total price for the sweaters purchased was $741. How many sweaters were purchased in this order?
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百分率增减・折扣与复合变化挑战
A scientist studied the effects of mixing two chemicals, chemical A and chemical B, by gradually adding more of each chemical to a mixture of the two chemicals. At the start of the study, the mass of chemical A in the mixture was equal to the mass of chemical B in the mixture. From the start of the study to the end of the study, the mass of chemical A in the mixture increased by 2,400% and the mass of chemical B in the mixture increased by 280%. At the end of the study, the mass of chemical A in the mixture was approximately how many times as great as the mass of chemical B in the mixture?
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百分率增减・折扣与复合变化挑战
In 2005, Chloe earned 12% more than in 2004, and in 2006 Chloe earned 5% more than in 2005. If Chloe earned y times as much in 2004 as in 2006, which of the following is closest to the value of y?
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百分率增减・折扣与复合变化进阶
A number \( f \) is 120% greater than a positive number \( g \). A number \( h \) is 90% less than the number \( f \).
The number \( h \) is how many times the number \( g \)?
The number \( h \) is how many times the number \( g \)?
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百分率增减・折扣与复合变化挑战
The daily precipitation total at a weather station is recorded by a weather instrument each day. The daily precipitation total recorded on Monday was 19.00 millimeters. The daily precipitation total recorded on Tuesday was a 136.00% increase from the daily precipitation total recorded on Monday. What was the daily precipitation total, in millimeters, recorded on Tuesday?
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百分率增减・折扣与复合变化进阶
The price of an item increased by p% from $64 to $68. What is the value of p?
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百分率增减・折扣与复合变化挑战
The percent increase in mass of a certain red kangaroo from 70 days old to 140 days old was 563%. If this red kangaroo's mass was k grams at 70 days old, which expression represents its mass, in grams, at 140 days old?
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百分率增减・折扣与复合变化进阶
The number a is 60% less than the positive number b. The number c is 50% greater than a. The number c is how many times b?
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百分率增减・折扣与复合变化挑战
At a hotel, guests used the pool for a total of t hours in March. At the same hotel, guests used the pool for 3.49t hours in April. What is the percent increase in the number of hours guests used the pool from March to April?
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百分率增减・折扣与复合变化基础
The population of Greenville increased by 7% from 2015 to 2016. If the 2016 population is k times the 2015 population, what is the value of k?
原库参考解析
百分率增减・折扣与复合变化进阶
The population of City A increased by 7% from 2015 to 2016. If the 2016 population is k: times the 2015 population, what is the value of k?
原库参考解析
