Answer: 45$
Step-by-step explanation:
Given
Principal 
Rate 
time 
Simple interest is given by

In the question, time is taken in months which is incorrect
Putting values

The value of the money will increase
12s - 29 < 50 - 3s - 25
Like terms
12s - 29 < 25 - 3s
+3s. +3s
S cancels
15s - 29 < 25
+ 29. +29
15s. < 54
/15. /15
S < 3.6
Answer=10
When rounding to the nearest whole number, we need to look to the number in the tenths place
10.09
If the number is 5 or greater, we round up. If the number is 4 or less, we round down.
The number is 0, so we would round down.
10.09 becomes 10