<span>Given that for every $1 increase in the price of the t-shirts, they will sell 20 less shirts. The revenue function R(x) is giiven by R(x) = (400 - 20x)(10 + x) = 4000 + 200x - 20x^2. Therefore, the revenue function representing the revenue Mrs Bell's class earns from selling Hobbs Middle Jaquar t-shirts is given by R(x) = 4000 + 200x - 20x^2 where x represent the $1 price increases and revenue is equal to the number of t-shirts sold times the cost of each shirt.</span>
Using the decay formula: Total = start value x (1 - rate)^time
Total = 23,840 x (1-0.04)^10
Total = 23,840 x (0.96)^10
Total = 15,849.61
Rounded to nearest whole number = 15,850
Neither the equation nor its inverse is a function
F(n)=1+-7. You put the F as the equation and 1 as the first term plus whatever you add
So 13/65=x/100 (percent is out of 100) so
if we use a calculator to do 13/65 then we get .2/1
but we want x/100 not x/1 so
multiply top and bottom by 100
.2 times 100=20
1 times 100=100
20/100
20%
