5272道题目5525 条题源记录 · 相同内容已合并
比・比例・速率与单位换算基础
The area of a rectangular region is increasing at a rate of 300 square centimeters per hour. What is this rate, in square meters per minute? (1 meter =100 centimeters)
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比・比例・速率与单位换算进阶
How many centimeters are equivalent to 47 meters? (1 meter = 100 centimeters)
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比・比例・速率与单位换算挑战
One gallon of sealant costs $29 and will cover 300 square feet of a surface. A deck has a total surface area of d square feet. Which equation represents the cost c, in dollars, of the sealant needed to cover the deck twice?
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比・比例・速率与单位换算挑战
An area of 56.00 square nautical miles is equivalent to k square kilometers. To the nearest tenth, what is the value of k? (1 nautical mile = 1.852 kilometers)
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比・比例・速率与单位换算进阶
An object's speed is increasing at a rate of 10.5 meters per second squared. What is this rate, in miles per minute squared, rounded to the nearest tenth? (Use 1 mile = 1,609 meters.)
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比・比例・速率与单位换算挑战
A 9-pound cat eats two types of canned cat food: chicken-flavored and duck-flavored. The recommended amount of chicken-flavored food is 2.25 cans per 8 pounds of a cat's weight per day. The recommended amount of duck-flavored food is 0.75 cans per 5 pounds of a cat's weight per day. If c is the number of chicken-flavored cans and d is the number of duck-flavored cans a 9-pound cat eats in one day, which equation describes all the possible values of c and d for the cat to eat the recommended amount of food based on its weight?
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比・比例・速率与单位换算挑战
The speed of a white-throated needletail, a type of bird, in flight was measured to be 79 miles per hour. What was the white-throated needletail's measured speed, in kilometers per hour? (Use 1 mile = 1.6 kilometers.)
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比・比例・速率与单位换算进阶
Gentoo penguins are the fastest swimming-underwater birds. A gentoo penguin was recorded swimming at a rate of 7 meters per second for 160 meters. For approximately how many seconds was the penguin recorded swimming at this rate?
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比・比例・速率与单位换算进阶
An object's speed is increasing at a rate of 9.4 meters per second squared. What is this rate, in miles per minute squared, rounded to the nearest tenth? (Use 1 mile = 1,609 meters.)
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比・比例・速率与单位换算进阶
The number of muskrat in a 131-acre area is estimated to be 2,096.what is the estimated population density, in muskrat per acre, of this area?
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比・比例・速率与单位换算进阶
The density of a certain type of wood is 553 kilograms per cubic meter. A sample of this type of wood is in the shape of a cube, where each edge has a length of 0.60 meter. To the nearest whole number, what is the mass, in kilograms, of this sample?
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比・比例・速率与单位换算挑战
How many square meters per minute is equivalent to a rate of 1800 square centimeters per hour? (Note: 1 meter = 100 centimeter)
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