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question 1: The total revenue received from the sale of x units of a product is given...

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Advance Math

question 1:

The total revenue received from thesale of x units of a product is given by

TRx=-3x^5 + 3/2x^4+ x/4+12square x+ 6y

     

Find the

    1. Average revenue AR.
    1. Marginal revenue MR.
    1. MR at x = 4.      
    1. The actual revenue from selling10th item.
    1. Write down different rule of derivative.

question 2 :

  1. Calculate the principle amount borrowed from the bank for 20months at a rate of 7 3/4 % per annum with interest of 2250 RO.Also find the total amount to be paid back to the bank .
  1. Find the rate of interest required for an investment of 2000 ROto earn 320 RO interest over a period of 18 months.
  1. A family spends 30 % of their income on mortgage installmentsof 500 RO per month. Calculate the monthly income of thefamily.
  1. Find the sale price of a car if its cost price is 5500 RO and %loss is 15%.
  1. The price of a PC decreases from 60 RO to 55 RO. Express thisdecrease as a % decrease.

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