Question

Please help!? I'm soooo confused? Please help as soon as possible. It's do soon! I would really appreciate it.

Answer 1

16 and 17. area is given. A=$\pi r^{2}$ use this relation to find radius

18.base=2, h=3.8 so, area=(1/2)*base*h=3.8 thats option D

19. area= base*h=12*7=84 option B

20.area of trapezoid= (1/2)h(a+b) where a and b are parallel sides.
so, area=(1/2)(3)(8.9+3.3)=(1/2)(3)(12.2)=3*6.1=18.3 option D