2.


3.

4.

This fraction is

5.

6.

7.

8.

9.
from 8.45am to 12.45pm - 4 hours

I earn

10.
48 minutes = 1 hour - 12 min
21.15 - 1 hour = 20.15
20.15 + 12 min =
20.27
11.

12.


I get up at 6.45am
13.

14.

15.
Answer:
See explanation below.
Step-by-step explanation:
Let's say,
represents the sale price of radio.
Then the marked price of the radio is 
The cost price of the radio is 
The discount is simply 25% because the radio is being sold at 25% less then the marked price.
The gain percent is given as:

The radio is being sold at 12.5% gain.
Best Regards!
Well $25 is the standard price initially.
$10 is added every hour as a constant rate.
Therefore a. 25 + 10h is the right expression