19. a spherical balloon has a circumference of 19cm. what is the approximate surface area of the balloon to the nearest square centimeter?
a) 114 cm^2
b) 460 cm^2
c) 361 cm^2
d) 1,134 cm^2

idk

step-by-step explanation:

b. 18

step-by-step explanation:

so the equation for this is:

ab^2=ac⋅ad

ab being the top length of 6 and ac being the length of 2 and ad being the length of x. let's plug into the equation:

6^2 = 2x

now lets just solve for x:

36 = 2x

18 = x

i hope that !