Question

camilla borrows a book from the library for ( d ) days. the library charges a late fee of 0.10 dollars per day that the book is late.

if camilla returns the book more than 21 days after she borrowed it, the expression ( 0.10(d - 21) ) represents the total late fee camilla owes.

what does ( (d - 21) ) represent in this context?

choose 1 answer:

a) the number of days camilla borrows the book

b) the late fee camilla owes per day the book is late

c) the late fee camilla owes per day she borrowed the book

d) the number of days the book is late

Explanation:

• Option A: \( d \) is the number of days borrowed, not \( d - 21 \), so A is wrong.
• Option B: The daily late fee is \( 0.10 \) dollars, not \( d - 21 \), so B is wrong.
• Option C: The late fee per borrowed day doesn't make sense here; late fees are for late days, so C is wrong.
• Option D: Since \( d \) is total days borrowed and 21 is the non - late period, \( d - 21 \) is the number of days the book is late (as late fees start after 21 days).

Answer:

D. The number of days the book is late