SULULIUI 1
What is "compound interest"?

Compound interest is the addition of interest to the principal sum of a loan or deposit, or in other words, interest on interest.

Step-by-step explanation:

It is the result of reinvesting interest, rather than paying it out, so that interest in the next period is then earned on the principal sum plus previously accumulated interest.

it's added on to the loan

Step-by-step explanation:

the other person totally searched it up so you could just done that but if you want a simplified answer here it is

0.76%

Step-by-step explanation:

This exercise is solved through combinations.

The first is the number of combinations of students that would go in that course, that is, 5 out of 40.

Formula: nCx = n! / X! * (N-x)!

 40C5 = 40! / [5! * (40 - 5)!] = 658008

Also the number of combinations of the other members of the audience that occupy the other 4 places (9 in total - 5 of the group), that is 4 of 90 (130 total - 40 of the group658008po).

90C4 = 90! / [4! * (90 - 4)!] = 2555190

The total of possible combinations 9 contestants with 5 students in them, would be:

40C5 * 90C4

Now, the total number of possible 9 contestants from the audience would be 9 in 130:

130C9 = 130! / [9! * (130 - 9)! = 2.2016 * 10 ^ 13

The probability would be equal to:

40C5 * 90C4 / 130C9 = 658008 * 2555190 / (2.2016 * 10 ^ 13) = 0.076

In other words, the probability is 0.76%