We start to solve this by looking for the formula that let us calculate an average value, this formula would be:

where Save is the average score and s is the score of each exam, Since we know the value of the score Save and 4 of the exams we can replace them in the formula, like this:
And we can solve for s5, which is the score that we need to find, like this:

Then, Pedro must have a 55 score on the fifth test
Answer:
$ 4500
Step-by-step explanation:
Dejar;
Principal sea P
El tiempo sea T
Tasa sea R
Interés sea yo
De la pregunta;
R = 8%, T = 1 año, I = $ 360, P =?
De;
I = PRT / 100
100I = PRT
P = 100 I / RT
P = 100 * 360/8 * 1
P = $ 4500
It would be the last option. I just worked the problem out and figured it out. I hope this helped! (:
Answer:
62,5721
Step-by-step explanation:
12,01 × 5,21
= 62,5721