# calculation

1. ### percentage calculation

HI, How to take percentage from a specific number. for example if Rs. 275000 is inclusive of 17.5% discount then what would be the net amount? and how to calculate it?
2. ### Ignore the sign (?!) in vertex calculation

In my course study it says: If y = (x - m)^2 + n , Then Vertex = (m, n) So far, so good. However, it also says: If y = - (x - m)^2 + n Then IGNORE THE SIGN and Vertex = (m, n) How can this be? y = (x - m)^2 + n \neq - (x - m)^2 + n I've tried factoring and the quadratic formula on...
3. ### Probability calculation

They are extracted consecutively three cards from a deck of 40, putting in the deck each time the card drawn. It calculates the probability that the cards drawn are: 1. three figures or three cards of the same color, R(281/3200) 2. three different cards...
4. ### Weighted Average Calculation

Hello, people of MHF! (First post, woo! (Rock)) I am attempting to calculate the overall test grade average based on a weighted average with values of different weights within the set of data. I know that the final test average is 93.2, that there are seven entries, and that three of the...
5. ### Need help with probability (theory and calculation)

Hi all Greetings. Need help to check & help with the questions below: Gender\Major Accounting Management Economics Total Male 80 120 30 230 Female 50 60 20 130 Total 130 180 50 360 (a) Give an example of a simple event. --- Need help (b) Give an example of a joint event. --- Need...
6. ### simple interest calculation

formula is I =Pin p= principal I=interest rate n= number of time periods Question A major airline IS planning to purchase new airplanes. It wants to borrow \$800 by issuing bonds. The bonds are for a 10-year period with simple interest computed quarterly at a rate of 2...
7. ### Integral area calculation between 3 curves

Im suppose to calculate the area between y=x/3 , y=x+2 and y=x-2 My attempt is to firstly get the area over the x axis and then multiply it by two since it looks like its the same area under and over. \frac{A}{2}=\int_{-2}^{1}(x+2) dx +\int_{1}^{3}(\frac{3}{x}-(x-2))dx This looks right to me...
8. ### Curve Calculation

Can anybody help with this? I haven't gotten very far and it's killing me not to be able to figure it out.
9. ### calculation of variance

The distribution of variable x is Normal with mean = 0 and sd =1; y is such that for y=1 ; x<= Q1, for y=2 ; Q1<= x<=Q2, and for y=3 ; Q2<= x , then find the variance of y Is it 2/3 ? please he
10. ### Partial derivative calculation

Show the following: \left(\frac{\partial}{\partial x}+x\frac{\partial}{\partial y}\right)^2 \neq \left(\frac{\partial}{\partial x}\right)^2 + 2x\frac{\partial ^2}{\partial x\partial y} + x^2\left(\frac{\partial}{\partial y}\right)^2 I haven't seen a partial derivative sign used without a...
11. ### Lat. Long and area calculation

Hi, I work in the aviation industry and I have a list of lat longs of airports in EMEA. Looking at a radius of 200 nautical miles I want to identify the least number of circles required to cover the largest area. I have included a sample below from an excel spreadsheet. lat long...
12. ### Help with a payday lending calculation please!

Hi, i'm hoping someone can help with a payday lending calculation please! I am looking to borrow £500 over 144 days at 0.7% per day. The number of repayments are 5 in total. I have used a number of amortization formulas (simple interest) to try to work out what the lending company are quoting...
13. ### help with a payday lending calculation please!

Hi, i'm hoping someone can help with a payday lending calculation please! I am looking to borrow £500 over 144 days at 0.7% per day. The number of repayments are 5 in total. I have used a number of amortization formulas (simple interest) to try to work out what the lending company are quoting...
14. ### double integral calculation

Hi, I needed to calculate the following integral, at region D at the right. I got stuck, getting integral from 0 to 0. I just don't get where is my mistake... Where did I go wrong?
15. ### double integral calculation

it is written in my book that the only way that I can calculate this integral, is by changing the order of integration. however, I get stuck at the begining... how can I solve that?
16. ### Trig calculation question

Hello, I am having problems on an easy trig question! What is 5 tan (5/(sqrt 3))? My teacher wants the answer in radians. I think it is 5 * pi/3. Thank you!
17. ### Application of vectors to the calculation of tension example question

I am at the point in my online calculus course where I learn applying vectors to calculate tension and there is an example which says, A 100 N chandelier is suspended from a ceiling at a single point by two chains that make angles of 20 degrees and 30 degrees with the ceiling. Calculate the...
18. ### Emissions Calculation

I am working on an emissions calculation for an air permit application with the EPA, from AP-42. The link for this calculation can be found here: http://www.epa.gov/ttn/chief/ap42/ch13/final/c13s0201.pdf This emissions calculation figures the emissions generated on paved roadways and parking...
19. ### Limit Calculation Problem

I know I've posted another question for you guys not so long ago, but for this next one I honestly didn't know where to begin. Lim [xsin(1/x)] x→0 Nothing that the current lesson on limits has taught me so far came close to working for this practice question. The main issue I had was trying...
20. ### Recurring deposit calculation

Can any1 pls help me to calculate recurring deposit interest with a simple calculator. recurring deposit means u deposit x amount of money every month and ur money is compounded monthly. I tried to simplify the equation but m stuck in simplifying variable with different exponents. Any other way...