Tutors Answer Your Questions about Proportions (FREE)
Question 533619: So I've been working on this word problem for about an hour and I'm not getting it at all. Here it is:
"A hybrid car averages 601 miles on a 12.2 gallon tank of gas. Manuel is planning a 1280-mile vacation in his hybrid car. Find how many gallons of gas he can expect to burn."
If you guys could help me, that would be awesome.
Click here to see answer by josmiceli(19441)   |
Question 533598: The diameter of Jupiter is approximately 11 times larger than the diameter of earth. Find the diameter of earth given that Jupiter has a diameter of approximately 89,000 miles. Express the answer to the nearest mile
Click here to see answer by Alan3354(69443)  |
Question 533728: Obtain a standard deck of 52 cards, and think of the cards as the 52 items your firm produces each day. Let the four aces and four kings in the deck represent defective items.
if 10 items are randomly sampled from a days production, what should be the proportion of defective items?
Please help! Thank you!
Click here to see answer by stanbon(75887) |
Question 534007: A metal smith wishes to create an alloy of 20%,silverand12% gold. She has three raw materials to work with. One is 10%,silverand10% gold the second is 25%,silverand10% gold, and the final metal is 30%,silverand15% gold. In what proportions should she combine the three to produce the desired alloy?
Click here to see answer by ankor@dixie-net.com(22740)  |
Question 536279: To find out how wide a river is, Jon and Sally mark an X at the spot directly across from the big rock on the other side of the river. Then they walk in a straight line along the river, perpendicular to the straight line between the X and the rock. After walking for 20 feet Jon stops while Sally continoues along a straight line for another 10 feet. Then she makes a 90 degree turn and walks for 30 feet. When she stops and looks at the rock she sees that the straight line from her to the rock passes trought Jon. What is the distance from X?
Click here to see answer by KMST(5328)  |
Question 540287: last year asante drove his car 11,645 miles and changed his oil 4 times. if he drives 5,700 miles this year and changes his oil at the same rate, how many times will he change his oil this year?
Click here to see answer by rfer(16322) |
Question 540352: john caught 60 fish on saturday and tagged them all, on tuesday he caught 60 fish, three were tagged. he returned all to the pond. if the percent of tagged fish that john caught on tuesday equals the percent of all the tagged fish in the pond, what is the number of fish in the pond
Click here to see answer by stanbon(75887) |
Question 541004: If the ratio of width to length for the U. S. flag is 10 to 19, then how long should a flag be that is 38 inches wide? I'm not sure how to calculate the difference between the 10 and 19 and apply it to the second dimensions.
Click here to see answer by AnlytcPhil(1806)  |
Question 541107: I need to help my daughter with this question. When iron metal reacts with oxygen, the reaction can form Fe203. The balanced chemical equation I think is right is 4 Fe + 302----2Fe203. So I have 4 moles of iron + 3 moles of oxygen creates 2 moles of iron oxide. I need to find the number of moles of oxygen that are needed to form 6 mol of Fe203. Could you show all work so I can understand? I have looked through internet to try and understand and also in her pre algebra book but the use only h20 so I dont get it. I know 1 mole =6.02*10^23 so confused. Thank you if you can help.
Click here to see answer by KMST(5328) |
Question 542279: Jaron is downloading a file. The size of the file is 3200kg. It takes 3 minutes to download the first 1200kg of the file. If the file continues downloading at the sam rate, how many more mintues will it take to finish downloading?
I tried to put the ratio of 3200kg:3min = 1200KG:X I didnt understand where to go next. Thank you for trying to help.
Click here to see answer by neatmath(302)  |
Question 542482: Sweets were placed in 3 containers, A, B, and C. The ratio of sweets in A and B was 7:4 and the ratio in B and C was 3:2. After 36 sweets were from A, the number of sweets in C was 2/3 the number of sweets in A. What was the total number of sweets left in the three containers?
Click here to see answer by ankor@dixie-net.com(22740) |
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