Can someone help me out with this question? The question is about circle diameters. I'm unfamiliar with finding the length of the arc. If someone answers can you explain the answers step by step, thank you!

i think the answer is b.

step-by-step explanation:

not 100% sure though.

c. y = 1/4 x + 5

step-by-step explanation:

first, put the equation of the line on the graph into slope-intercept form

(y = mx + b):   y = -4x + 8

second, a perpendicular line has to have "an opposite/reciprocal slope" to the original slope. so, find the "m" value in your original equation (it's -4, right? )

original slope: m = -4   perpendicular slope: change the sign to its opposite and find the reciprocal ("flip" the number)

new slope is now positive (b/c the original slope was negative 4), and it's 1/4 (not the original slope of 4 or 4/1)

i believe your answer is 99.7% of 7-year-old children are between 46.6 inches and 49.5 inches tall.