Answer:
88.00 and subtract 28 and the 3 shirts were
Step-by-step explanation:
answer 60
Answer:
$187.50
Step-by-step explanation:
250/25= $12.50 per person
12.5 x 15= $187.50
Answer:
Example: Value = 20,000 (2.98/3)ⁿ
Explanation:
The function of a decay exponential function with decreasing rate r is:
y = A (1 - r)ⁿ
For example: y = 10(1 - 0.1)ⁿ, is a exponential function with decreasing rate 0.1 or 10%.
Then, for the given decreasing rate of 8% yearly, we fiirst find the monthly rate by dividing by 12: r = 8% / 12 = 0.08 / 12 = 0.02 / 3.
With that, the general form of the searched function to model the decrease in the car's value eah month is:
Value = A (1 - 0.02/3)ⁿ = A (2.98 / 3)ⁿ
In that equation, A is the initial value of the car.
Suppose a car whose initial value is $ 20,000, then the function (model) is:
Value = 20,000 (2.98/3)ⁿ
You van verify the validity of that model by doing a table:
Month value 20,000(2.98/3)ⁿ
0 20,000 (2.98 / 3)⁰ = 20,000
1 20,0000 (2.98 / 3) = 19,866.67
3 20,000 (2.98 / 3)² = 19,734.22
4 20,000 (2.98 / 3)³ = 19,602.66
And now calculate the rate of decrease of the value for any consecutive pair of months.
For example for months 3 and 4, rate of decrease = [19,734.22 - 19,602.66] / 19,734.22 =0.006667 monthly.
Multiply by 12 to find the rate per year: 0.006667 (12) = 0.08 = 8%
