Tutors Answer Your Questions about Proportions (FREE)
Question 330480: Jim is making a diagram of the solar system. If he draws Neptune, which is 2795 million miles from the sun, 10 inches from the sun on his paper, how far away ( to the nearest tenth of an inch) from the sun should he draw Mars, which is 142 million miles from the sun?
Click here to see answer by nyc_function(2741)   |
Question 331630: Problem: the instructor of an introductory computer course wants to make a wall chart of a computer desktop for students.to make it realistic the desktop icons must be proportional to the size of her 6ftX6ft wall chart. If the icons on her 15"X15" PC screen are 3/8" X 3/8" How large should they be on her wall chart?
I think I have to find out what 3/8 to 15 is ,then use that to calculate for 6ftX6ft chart. Im not able to reason out a formula .
Click here to see answer by solver91311(24713)  |
Question 332210: I have a space that is 9 ft long and 6 ft wide. I want to increase the dimensions of the space by the same distance each way and have the area of the new space 5 times the area of the present space. How many ft should I add to both the width and the length? Thanks
Click here to see answer by mananth(16946)  |
Question 335722: The pre-med adviser of a liberal arts college is trying to determine the proportion of students entering the pre-med program who gain admission to medical school within 6 years of entering the program.
a. If she does no preliminary study, how many former students from the pre-med program must she contact to be 90% sure that the point estimate is within 0.1 unit of p?
b. A random sample of 36 former students from the pre-med program showed that 24 entered medical school within 6 years from the time they entered the program. How many more must she contact to be 90% sure that the point estimate is within 0.1 unit of p?
Click here to see answer by jrfrunner(365)  |
Question 336091: Grant counted 277 distinct beluga whales in the St. Lawrence Seaway in one week. The following week he counted 343 distinct belugas. What was the percent (round to the nearest one hundredth of a percent) of increase in the whales counted?
Click here to see answer by Theo(13342)  |
Question 337651: If a single letter is drawn from the set {m,a,t,h,e,i,c,s}
what is the probability that the letter drawn is a member
of the set {m,a,t,h}?
Can someone please help me with this I am completley lost on how to do this. I think that the probability would be 1/2 but I do not know how to explain it. Thank you!
Click here to see answer by Fombitz(32388)  |
Question 340832: An 8‐inch by 10‐inch map is drawn to a scale of 1 inch = 50 miles. If the same map is to be enlarged so that now 2 inches = 25 miles, how many 8‐inch by 10‐inch pieces of blank paper will be taped together in order for all of this map to fit?
(a) 1/2 (b) 2 (c) 4 (d) 8 (e) 16
Click here to see answer by mananth(16946) |
Question 341203: I don't think this is a proportion questions, but didn't know what to call it. I am trying to help my 12 year old son.
Rick earns $500 less than three times as much as Jim. If their combined salary is $49,500, how much do they each earn?
Click here to see answer by rfer(16322) |
Question 344448: A theater sold 480 tickets for a play last night. Floor seats sold for $30.00 each and balcony seats sold for $24.00 each. The total amount collected for the 480 tickets was $13,200.00. How many seats of each type were sold?
The book solves it by using the equation 30f+24(480-f)=13,200
f=number of floor tix
30f=total cost of floor tix
24(480-f)=total cost of balcony tix
Im not comprehending this way of solving, I remember in algebra class my professor using two different variables for each piece of the problem (floor tix=f) balcony tix=b) then using i think the distributive property?? Could you think of another way to help me understand?
Click here to see answer by nerdybill(7384)  |
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