Question

Jeremy’s grandmother will add $15 to any amount that Jeremy decides to deposit in the bank. Jeremy plans to deposit between $50 and $100. The function t(j) = 15 + j models the total amount of money that will be deposited into Jeremy’s account, where j is the amount of money Jeremy deposits.

What is the practical domain of the function?


all integers from 50 to 100, inclusive
all real numbers from 50 to 100, inclusive
all real numbers from 65 to 115, inclusive
all multiples of 15 between 65 and 115, inclusive

Answer 1

@iGreen

Answer 2

@iGreen Can you help

Answer 3

We know Jeremy will deposit somewhere between $50 and $100

If he deposits $50 his grandmother will add $15 to make the total $65
If he deposits $100 his grandmother will add $15 to make the total $115

So, the practical domain would be integers from $65 to $115