Emily is entering a bicycle race for charity. her mother pledges $0.30 for every 0.75 mile she bikes. if emily bikes 12 miles, how much will her mother donate?

Emily's mother will donate

$

24

.

Step-by-step explanation:

The pledge amount is

$

0.40

for every

0.25

(quarter) mile. So for one mile, the pledge amount will be:

0.40

×

4

=

1.60

Therefore, for

15

miles, the total donation will be:

15

×

1.6

=

24

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step-by-step explanation:

b

step-by-step explanation:

a difference is the result of subtraction. while each of these expressions has subtraction in it, a difference will be the result when subtraction is the last operation applied in the order of operations for the expression. this means subtraction must be outside of the parenthesis. only b has this.