I'm s confused? as soon as possible. it's do soon! i would really appreciate it.

16 and 17. area is given. A= 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

5.35 rounded to the nearest hundredth
5.4