Astats 10 test has 4 multiple choice questions with four choices with one correct answer each. if we just randomly guess on each of the 4 questions, what is the probability that you get exactly 1 question correct? find the nearest answer. select one:
a. 0.422
b. 0.012
c. 0.0466
d. 0.105

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.

step-by-step explanation:

(a) the volume of the cone is 20/3 in3

hence, option a is correct.