Estimate 78% of 20
a.14
b.16*
c.19
d.2

i think i’m correct but can someone break it down? ?

B

Step-by-step explanation:

50% of 20 is 10

25% of 20 is 5

50% + 25% = 75%

75% is close to 78%

10 + 5 = 15

15 is close to 16

the figures below are made out of circles, semicircles, quarter … find the area and the perimeter of each figure and give your answers as a completely simplified exact value in terms of π (no approximations). remember that we'll also have to cut whatever areas we get in half, since we're only dealing im pretty sure that is the right answer

step-by-step explanation: