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Find the value of cos A if angle A is acute and sin A = 7/10






The Correct Answer

A right circular cylinder is shown below, with dimensions given in inches. What is the total surface area of the cylinder, in square inches?(Note: The total surface area of a cylinder is given by 2πr2 + 2πrh, where r is the radius and h is the height.)

(A)3π (B) 5π (C) 6π (D) 8π (E) 11π

Correct Answer: D

Which of the following numbers is an imaginary number?

(A) (B) (C) - (D) - (E) -

Correct Answer: D

In the standard coordinate plane, what is the y-coordinate of the point of intersection of the two lines y = 4x – 6 and y = 2x + 2?

(A)4 (B)6 (C)10 (D)18 (E)30

Correct Answer: C

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