A store manager earns "d" dollars per hour. How much money will she earn in an 8-hour day?

Answer 1

Please learn this:

The Identity Property of Multiplication is defined as the property of multiplication which states that the product of a number and 1 is always equal to the given number. It can be mathematically written as, a × 1 = a, where 'a' can be any number. 

In this problem, we convert units -- from hours to days

1 = (8 hours)/(1 day) = (1 day)/(8 hours) ,,, use the one that lets units cancel

d dollars/hour

d (dollars/hour)*1

d (dollars/hour)*((8 hours)/(1 day))

8d dollars/day

Answer 2

1 * d for one hour

2 * d for two hours

3 * d for three hours

Can you follow the pattern and calculate for 8?