Solve.Sand is poured carefully into a pile that forms a right circular cone as shown. The total surface area of the cone with slant height s and base radius r is given by the polynomial ?r2 + ?rs. Find an equivalent expression by factoring out a common factor.
A. ?r(?r + s)
B. ?r(r + s)
C. r(?r2 + ?s)
D. ?rs(r + 1)
Answer: B
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Solve the problem.A pair of six-sided dice are rolled. The observation is the number that comes up on each die. The event described by E: "at least one die will come up as an even number" is
A. {(1, 2), (1, 4), (1, 6), (2, 1), (2, 3), (2, 5), (3, 2), (3, 4), (3, 6), (4, 1), (4, 3), (4, 5), (5, 2), (5, 4), (5, 6), (6, 1), 
(6, 5)}.
B. {(2, 2), (2, 4), (2, 6), (4, 2), (4, 4), (4, 6), (6, 2), (6, 4), (6, 6)}.
C. {(1, 2), (1, 4), (1, 6), (2, 1), (2, 3), (2, 4), (2, 5), (2, 6), (3, 2), (3, 4), (3, 6), (4, 1), (4, 2), (4, 3), (4, 5), (4, 6), 
(5, 4), (5, 6), (6, 1), (6, 2), (6, 3), (6, 4), (6, 5)}.
D. {(1, 2), (1, 4), (1, 6), (2, 1), (2, 2), (2, 3), (2, 4), (2, 5), (2, 6), (3, 2), (3, 4), (3, 6), (4, 1), (4, 2), (4, 3), (4, 4), 
(4, 6), (5, 2), (5, 4), (5, 6), (6, 1), (6, 2), (6, 3), (6, 4), (6, 5), (6, 6)}.
E. none of these
Find the exact value of the expression or state that it does not exist.sec[tan-1(-
)]
A. 
B. - 
C. 2
D. 
Provide an appropriate response. Is the statement true or false?3x3 + 2x4 = 5x7
A. False B. True
Solve for the variable.-8x = -64
A. 7 B. -7 C. -8 D. 8