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In the (x,y) coordinate plane below, points P (6,2) and Q (1,4) are two vertices of ΔPQR. If PQR is a right angle, then which of the following could be the coordinates of R?

(A) (4,-3)

(B) (3, 0)

(C) (2, 1)

(D) (2, 4)

(E) (3, 9)

The Correct Answer
Explanation

The triangle shown below has a hypotenuse with a length of 13 feet. The measure of A is 20° and the measure of B is 70°. Which of the following is closest to the length, in feet, of ?

(Note: sin 70° ≈ 0.9397
     cos 70° ≈ 0.3420
     tan 70° ≈ 2.747)

(A) 4.4 (B) 5 (C) 12 (D) 12.2 (E) 35.7

Correct Answer: A

The cross-sectional view of a tent is shown below. If the tent is 6 feet wide at its base, then which of the following expressions could be used to calculate the height of the tent, in feet?

(F) (G) 3 tan 40° (H) (J) 6 tan 40° (K) 3 tan 80°

Correct Answer: H

The volume of a cone is given by the formula V = imageR2h, where R is the radius of the base of the cone and h is the height of the cone. What is the volume, in cubic centimeters, of a cone with a height of 8 cm that has a base with a radius of 3 cm? image

(A)72π (B) 48π (C) 24π (D) 12π (E) 8π

Correct Answer: C

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