An investment firm invested in 2 companies last year. they invested 40,000 in company a and made a profit of 15%. they invested company b 10,000 and made profit of 22% how much was total profit and percentage

total profit is $8200.

Percentage of profit is 16.4℅

Step-by-step explanation:

Let x represent the total profit.

Total amount invested in company A is $40000. The profit made from this investment is 15% of 40000. It becomes

15/100 × 40000 = 6000

Total amount invested in company B is $10000. The profit made from this investment is 22% of 10000. It becomes

22/100 × 10000 = 2200

The total profit would be 6000 + 2200 = $8200

Total amount of money 40000 + 10000 = 50000

The percentage of the total profit on the total amount invested is

8200/50000 × 100 = 16.4%

since your problem is x^4 = 81, what you have to undeo is the "to the fourth power" part.

the inverse (opposite operation) of "to the fourth power" is "to the fourth root".

  (x^4) ^ ¼   = 81 ^ ¼  

  81 = 3^4     so (3 ^ 4) ^ ¼   =   3 ^ 1   = 3

by hand: (3 ^ 4) ^ ¼   =   3 ^ (4 x ¼) = 3 ^ 1   = 3   (when you take a power to a power, multiply the exponents.)

or, do it by calculator. one way of finding the fourth root is to use ^ (1/4)

step-by-step explanation:

i think it is 18

step-by-step explanation: