Which proportion can be used to find the arc length, s, in units?

Option B

Step-by-step explanation:

Formula to be used to calculate the length of an arc,

Length of arc =

Here, θ = Angle subtended at the center by the arc

r = radius of the circle

By substituting values in the formula,

s =

Therefore, Option B will be the answer.

check the picture below.

well, the angle at the vertex d is clearly not a right-angle, let's check for the one at the vertex f which does look like,   however if it's indeed, that means ef is perpendicular to df, in which case their slopes will be negative reciprocal of each other.

so the negative reciprocal of the slope of ef is 1, however the slope of df is not 1, is 1/2, so nope, they're not perpendicular lines.

answer is the third choice:

3x^5+4x^4+x^3+2x^2-10x-7=0

step-by-step explanation: