7.3 Applications of proportions  (Page 2/2)

On a map, 3 inches represents 100 miles. How many miles are represented by 15 inches?

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An alcohol solution is composed of 14 parts water to 3 parts alcohol. How many parts of alcohol are in a solution that is composed of 112 parts water?

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A $5\frac{1}{2}$ -foot woman casts a 7-foot shadow at a particular time of the day. How long of a shadow does a 3-foot boy cast at that same time of day?

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The rate of houseplants to outside plants at a nursery is 4 to 9. If there are 384 houseplants in the nursery, how many outside plants are there?

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The odds for a particular event occurring are 11 to 2. (For every 11 times the event does occur, it will not occur 2 times.) How many times does the event occur if it does not occur 18 times?

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The rate of passing grades to failing grades in a particular chemistry class is $\frac{7}{2}$ . If there are 21 passing grades, how many failing grades are there?

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On a map, 4 inches represents 50 miles. How many inches represent 300 miles?

On a blueprint for a house, 2 inches represents 3 feet. How many inches represent 10 feet?

A model is built to $\frac{2}{\text{15}}$ scale. If a particular part of the model measures 6 inches, how long is the actual structure?

An acid solution is composed of 5 parts acid to 9 parts of water. How many parts of acid are there in a solution that contains 108 parts of water?

An alloy contains 3 parts of nickel to 4 parts of silver. How much nickel is in an alloy that con­tains 44 parts of silver?

The ratio of water to salt in a test tube is 5 to 2. How much salt is in a test tube that contains 35 ml of water?

The ratio of sulfur to air in a container is $\frac{4}{\text{45}}$ . How many ml of air are there in a container that contains 207 ml of sulfur?

A 6-foot man casts a 4-foot shadow at a particu­lar time of the day. How tall is a person that casts a 3-foot shadow at that same time of the day?

A $5\frac{1}{2}$ -foot woman casts a $1\frac{1}{2}$ -foot shadow at a particular time of the day. How long a shadow does her $3\frac{1}{2}$ -foot niece cast at the same time of the day?

A man, who is 6 feet tall, casts a 7-foot shadow at a particular time of the day. How tall is a tree that casts an 84-foot shadow at that same time of the day?

The ratio of books to shelves in a bookstore is 350 to 3. How many books are there in a store that has 105 shelves?

The ratio of algebra classes to geometry classes at a particular community college is 13 to 2. How many geometry classes does this college offer if it offers 13 algebra classes?

The odds for a particular event to occur are 16 to 3. If this event occurs 64 times, how many times would you predict it does not occur?

The odds against a particular event occurring are 8 to 3. If this event does occur 64 times, how many times would you predict it does not occur?

The owner of a stationery store knows that a 1-inch stack of paper contains 300 sheets. The owner wishes to stack the paper in units of 550 sheets. How many inches tall should each stack be?

A recipe that requires 6 cups of sugar for 15 serv­ings is to be used to make 45 servings. How much sugar will be needed?

A pond loses $7\frac{1}{2}$ gallons of water every 2 days due to evaporation. How many gallons of water are lost, due to evaporation, in $\frac{1}{2}$ day?

A photograph that measures 3 inches wide and $4\frac{1}{2}$ inches high is to be enlarged so that it is 5 inches wide. How high will it be?

If 25 pounds of fertilizer covers 400 square feet of grass, how many pounds will it take to cover 500 square feet of grass?

Every $1\frac{1}{2}$ teaspoons of a particular multiple vitamin, in granular form, contains 0.65 the mini­mum daily requirement of vitamin C. How many teaspoons of this vitamin are required to supply 1.25 the minimum daily requirement?

( [link] ) Find the product, $\text{818}\cdot 0$ .

( [link] ) Determine the missing numerator: $\frac{8}{\text{15}}=\frac{N}{\text{90}}$ .

( [link] ) Find the value of $\frac{\frac{3}{10}+\frac{4}{\text{12}}}{\frac{\text{19}}{\text{20}}}$ .

( [link] ) Subtract 0.249 from the sum of 0.344 and 0.612.

( [link] ) Solve the proportion: $\frac{6}{x}=\frac{\text{36}}{\text{30}}$ .