Question

Help with question???

Answer 1

Circumference C, radius r.


`C = 2\pi r`


`r = (C)/(2\pi)`


`\pi r^2 = \pi (C^2)/(4 \pi^2) = (C^2)/(4\pi)`

75% of the area is


`(3)/(4) \pi r^2 = (3C^2)/(16\pi)`

Plugging in C=10 gives


`(3)/(4) \pi r^2 = (3(10)^2)/(16\pi) = (75)/(4 \pi) \approx 5.97`

Choice 1, 6 square units.