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Question 122396: A refrigerator was discounted 30% of the original price. The discounted price is $447.30. What was the original price?
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Question 122397: the Pro Shop sold 6 of 20 tennis rackets in May. What percent of the tennis rackets were sold?
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Question 124977: In a car park, the ratio of red cars to green cars is 5:6, while that of green cars to blue is 3:10.Find the ratio of red cars to blue cars.
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Question 125061: In a rectangle, the ratio of the length to the width is 5:4. If the rectangle is 30 inches long, find its width. (Points: 1)
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Question 125585: a recipe requires 3 cups of flour to make 27 dinner rolls. how muck flour is needed to make 9 rolls
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Question 125576: eleanor can complete two skirts in 15 days. how long will it take her to complete eight skirts
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Question 125579: kens new car can go 26 miles per gallon of gasoline. the cars gasoline tank holds 14 gallons. how far will he be able to go on a full tank.
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Question 125610: three eggs are required to make two dozen miffins. how many eggs are needed to make 12 dozen muffins?
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Question 125749: swiming pool contains 14000 gallons of water, how many gallons of chlorine do you need to add to get a 33 percent mixture?
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Question 125612: a contractor estimates it will coast 2,400 to build a deck to a customers specifications. how much would it cost to build 5 more identical decks?
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Question 125791: Can someone help me with this problem please?
The surface area of a sphere is directly proportional to the square of its radius. The volume of the sphere is directly proportional to the cube of the radius. Find the percentage increase in volume of the sphere if the surface area is increased by 25%.
My work so far:
Surface Area = S = 4πr^2
Radius = r
Volume = V = 4/3 πr^3
S ∝ r^2
V ∝ r^3
125% = 5/4
I tired to calculate the value of V/S as a start and got V/(S )= r/3
Then I got stuck. Hope you can help
Click here to see answer by kev82(151)

Question 125581: three eggs are required to make two dozen muffins. how many eggs are nedded to make 12 dozen muffins
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Question 121889: Find the scale used to create the model: What is scale model of a 72-inch long table is 8 inches long?
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Question 126100: A garden is 8 feet wide by 16 feet long. Make a scale drawing of the garden that has a scale of 1/4 in. = 2ft.
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Question 126210: What is the actual length of a room that measures 2.8 inches. the scale is 1/2 inch = 4 feet?
If a model airplane is 11 inches in length. the actual length of the airplane is 209 feet. what is the scale used to build the model?
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Question 126525: I think the problem is "Proportions". I can't find how to do it in my math book.
5 5
- (-2) = -
x 4
The problem above is '5 over x, minus 2, equals five over four.
The answer is 20 over 13. I need to know how to get that answer.
Click here to see answer by scott8148(6628)

Question 126814: The volume of a rectangular pool is 1,080 cubic meters. Its length, width, and depth are in the ratio 10:4:1. Find the number of meters in each of the three dimensions of the pool.
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Question 127061: The time T necessary to make an enlargement of a photo negative varies directly as the area A of the englargement. If 30 seconds are required to make a 3-by-5 englargement, find the time required for a 5-by-7 englargement
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Question 127301: What percent of 40 is 28?

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Question 127300: 90% of 50 is what number?
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Question 127299: 8% of what number is 96?
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Question 125575: mandy runs 4 kilometers in 18 minutes. she plans to run in a 15 kilometer race. how long will it take her to complete the race
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Question 122395: A salesperson earns a salaru plus a commission of 9% of total sale. How much is the commission on sales totaling $1654
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Question 127823: Two angles are complementary. One angle is twice as large as the other angle. Find the measures of the angles.
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Question 127821: The Perimeter of a rectangular garden is 24ft. The length is 2 more feet than the width. Find the length and the width of the garden.
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Question 128173: It takes Tom 3 hours less to paint a fence than Jim. If the two boys work together, they can paint the fence in 2 hours. How many hours would each boy, working alone, need to paint the fence?
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Question 129099: A stack of 100 nickels is 6.25 inches high. To the nearest cent, how much would a stack of nickels 8 feet high be worth?
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Question 129122: Melissa is making scale models of 2 buildings. The Empire State Building is 1250 feet tall. Melissa's model of the Em pire State Building is 2 meters tall. The seattle space Needle is 605 feet tall. If Melissa uses the same scale, which proportion can be used to find h the height in meters of her model of the Space Needle?
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Question 111334: The ratio of men to women at a certain company is 3 to 5. How many employees does the company have if there are 100 male employees?
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Question 129098: What is the ratio of the area of an equilateral triangle to that of a regular hexagon inscribed in the same circle?
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Question 129717: Math Question says Estimate the solution for the proportions. Example m/25=16/98
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Question 129873: Problem is from http://www.testprepreview.com/modules/algebra2.htm
If Steven can mix 20 drinks in 5 minutes, Sue can mix 20 drinks in 10 minutes, and Jack can mix 20 drinks in 15 minutes, how much time will it take all 3 of them working together to mix the 20 drinks?
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Question 130125: Write a proportion that is equivalent to the statement: If 3 gallons of gasoline cost $5.37, then 8 gallons will cost $14.32.
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Question 130317: I can't seem to find the solution to this problem. I would appreciate some guidance. Thank you. A solution containing 30% insecticide is to be mixed with a solution containing 50% insecticide to make 200 L of a solution containing 42% insecticide. How much of the 50% insecticide solution should be used? liters
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Question 130961: The problem reads as follows:
Ideally, a school district would like the boy/girl ratio in each classroom to be essentially the same as the ratio of boys to girls in the whole class. Suppose an incoming fifth grade class is made up of 123 boys and 87 girls. Assuming there are 7 classrooms, how many boys and girls will ideally be in each room?
I am puzzled on how to complete this one, any help would be greatly appreciated.
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Question 131794: The chemical formula for carbon dioxide is CO2. If the weight of carbon dioxide is 3520 grams, how much does the oxygen weigh? (C,12:O,16)
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Question 130538: I am totally having no luck with setting up and solving the following word problem, can somebody help, please?
1. An administrator of a web site is told that a new server can handle 11,000 "hits" per second. The web site is currently experiencing a peak demand of about 85,000 hits per second; but every month, the peak demand increases by 3500 hits per second. Use a proportion equation to determine how many new servers the administrator should buy to address expected traffic for the next 18 months.
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Question 132667: Solve Proportions: 9/-15 = -27/P
My question is: If just the denominator or just the numerator is a negative number does this make the entire fraction negative?
Thank you for your help,
Brooke
Click here to see answer by snwbrdfrk(10)

Question 132665: Solve Proportions: 9/-15 = -27/P
My question is: If just the demonitor or just the numerator is a negative number does this make the entire fraction negative?
Thank you for your help,
Brooke
Click here to see answer by checkley71(8403)

Question 132378: This word problem is stumping me, can anybody help?
1. Some students planned for a get-together. The budget for the food was $500. Five of the students failed to come therefore the cost of the food for each member increased by $5. How may students attended the get together?
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Question 132743: Can you please help me solve for x

500/(x+5)+5=500/x
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Question 133217: Solve for x
-5by/6(y+w-z)=x-6ax
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Question 133417: If the total number of x apples equals b cents, what is the general formula, in cents, for the cost of y apples? Can someone please explain how you arrive at the answer? I know it should be relatively easy but its not clicking in my mind, thank u very much!
Click here to see answer by solver91311(24713)

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