Step 2
because she should substitute the negative sign to 6
Answer:: D(t)= 50(4/5)^t
Step-by-step explanation: If 1/5 of the temperature difference is lost each minute, that means 4/5 of the difference remains each minute. So each minute, the temperature difference is multiplied by a factor of 4/5 (or 0.8).
If we start with the initial temperature difference, 50° Celsius, and keep multiplying by 4/5, this function gives us the temperature difference t minutes after the cake was put in the cooler.
So it is the product of
And 2,5 and 11 are prime numbers, so there you go :)
To help in the future, you can follow the equation
Whole * Percent = whole
In this case, the whole is 48 and the percent is 5/8
48 / 5/8 = 30
