Beccas dad told her that she needs to practice piano for two hours this week so far she has practiced 20 minutes on Monday a half an hour on Tuesday and 15 minutes on Wednesday how much longer does she need to practice?

Step-by-step explanation:

She needs to practice piano for 2 hours this week:

Lets add the time she played the piano so far:

Monday + Tuesday + Wednesday

Which is

20 + 30 (half an hour) + 15

= 65 minutes

In which 2 hours is equal to 120 minutes

So,

120 - 65 = 55

She needs to practice for 55 more minutes in this week

a. she will receive a refund of $278.

step-by-step explanation: