Ineed which one is the correct answer

Initial - M
number of people - 8 out of 100
8/100 = f/2000
100 x 20 = 2000
(do the same thing to top/numerator)
8 x 20 = 160
160/2000

So the correct answer would be b). 8/100 = f/2000.
And the answer would be 160 people out of 2000 people would be expected to have the letter M for a first-name initial.

2) 14.7

3) 50

Step-by-step explanation:

2.

21² = 441

15² = 225

441 - 225 = 216

√216 = 14.69 (rounds to 14.7)

3.

14² + 48² = 2500

√2500 = 50

Pythagoras Theorem lol