3 in the hundred-thousand place, 8 in thousands place, 4 in the hundreds place, 1 in the tens place, 2 in the one's place.
The answer to your problem, I’m pretty sure the second one, I’m not to sure tho!
To solve this problem you must apply the proccedure shown below:
1. You have that the ratio of the measures of the three angles is 
2. The sum of the interior angle of a triangle is 
3. Let's say that the measure of each angle is
multiplied by the ratio. Therefore, you can write the following equation and solve for
:

4. Therefore, the measure of each angle is:

The answer is: 
100 x 0.4 = 40. So 40 students listen to hip hop