Question

The total cost of buying rolls at a bakery can be

defined by an arithmetic sequence that depends
on how many rolls are bought. The bakery
charges $5.00 for one dozen rolls and $0.50 for
each additional roll. What is the common
difference, per roll, of this sequence in dollars?

Answer 1

Explanation:

The common difference of an arithmetic sequence is the same for each pair of consecutive terms in the sequence.

In this case, the cost of buying n rolls can be found by:

$5.00 for one dozen rolls, which is equal to $5.00 / 12 = $0.42 per roll

$0.50 for each additional roll

Therefore, the common difference, per roll, of this sequence in dollars is $0.50 - $0.42 = $0.08.