# percentage

1. ### percentage help

I didnt have a clue where to put this so forgive me! I didnt hand in a piece of work worth 20% of a subject i am taking. There are two other pieces of work, one worth 30% and the other worth 50%. So i still have 80% of the marks out of the whole subject to attain. What % do i have to score...
2. ### Logistics model percentage with absence of limiting factors

The question: The following table shows the number C, in millions, of basic subscribers to cable TV in the indicated year. These data are from the Statistical Abstract of the United States. Year | C 1975 | 9.8 1980 | 17.5 1985 | 35.4 1990...
3. ### differentials.. find maximum percentage error

The period T of a simple pendulum with small oscillations is calculated from the formula T = 2pie (L / g)^1/2 . Suppose that measurements of L and g have errors of at most 0.5% and 0.1% respectively. Use differentials to approximate the maximum percentage error in the calculated value of T. dT...
4. ### Percentage question

Hello, How can you explain in the most simple way (to a pupil age 10) what is 10% of 20% of 30% of 200? Many thanks, Natasha
5. ### Percentage problem

This year, 75% of the graduating class of Harriet Tubman High School had taken at least 8 math courses. Of the remaining class members, 60% had taken 6 or 7 math courses. What percent of the graduating class had taken fewer than 6 math courses?

The question is to determine the percentage rate of change of the function at t=1 and t=5 for: f(t)=e^{0.3t^2} I calculated the derivative to be: f'(t)=e^{0.3t^2}0.6t So is the answer to t=1, an increase of 60%? And for t=5, 750%?
7. ### Percentage question #3.

Question : Jane bought 5kg of grapes and 10kg of cherries at $82.50. If Jane were to buy 10kg of grapes and 5kg of cherries, she would only pay$75 If 100grams of grapes cost 45 cents, find the cost of 1kg of cherries.
8. ### Impossible Math Problem

I've been racking my brain all day on this. I'm usually pretty good about finding out how someone comes up with a number but I'm completely lost on this one. I'm in a battle of the bands tournament and the judge points are always different for each night. Each judge is allowed to award a...
9. ### really hard percentage, ratio and indices question

hi this is my question: Ali has 12% of 350kg of apples, James had 13% of left over. Helen and Jack divided the remaining in ratio of 2:3. how many kg of apples each person had? write in form of indices first of all i found out ali has 42kg of apples and james has 40.3kg of apples...
10. ### Percentage Problem.

Here is a question that I am having some serious difficulty on solving.. There are 75 more women than men enrolled in Linden College. If there are n men enrolled, then in terms of n, what percent of those enrolled are men? I thought that the answer would be: \frac{n}{n+75} because n is the...

15. ### percentage error in estimating the height of the building

A surveyor, standing 40 ft from the base of a building, measures the angle of elevation to the top of the building to be 70 degrees. How accurately must the angle be measured for the percentage error in estimating the height of the building to be less than 5 percent? I tried: \tan {70^ \circ }...

19. ### Percentage question #1.

(Doh)Mr. Lee earned a fixed salary every month last year. In March, he spent 40% of his monthly salary. In April, he spent 20% more than the amount he spent in March and saved the remaining \$2600 in the bank. What was his monthly salary?
20. ### Percentage problem???

Q) Of the adult population in Nagpur, 45% of men and 25% of women are married what percentage of total population of adults is married(assume that no man marries more than one woman and vice versa) ? Any help would be appreciated? Thanks, Ashish