The answer to the first question is B
The second question is B
6 semicircles = 3 circles
The formula of the area of a equilateral triangle:

We have a = |AE| = 3cm. Substitute:

The formula of the area of a circle:

We have 2r = |AE| =3cm → r = 1.5cm. Substitute:

The area of the figure:

900 = 2 · 2 · 3 · 3 · 5 · 5
Next numbers:
2 · 2 · 2 · 3 · 3 · 3 · 5 · 5 · 5 = 900 · 15 = 13,500
2 · 2 · 2 · 2 · 3 · 3 · 3 · 3 · 5 · 5 · 5 · 5 = 13,500 · 15 = 202,500
202,500 · 15 = 3,037,500
3,037,500 · 15 = 45,562,500
....
Answer:
y= 20/7
Step-by-step explanation:
4-5y + -2y+16 = 0
20-7y = 0
-7y = -20
y= 20/7
Answer:
348 of them are not postgraduates
Step-by-step explanation: