Solve the problem.A projectile is fired with an initial velocity of 300 feet per second at an angle of 70° with the horizontal. In how many seconds will the projectile strike the ground? (Round your answer to the nearest tenth of a second.)
A. 17.6 sec
B. 21.7 sec
C. 20.4 sec
D. 14.2 sec
Answer: A
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Provide an appropriate response.If markup is based on selling price, the selling price times 1 minus the markup percent on the selling price will equal the cost.
A. True B. False
Find the coordinates of the vertex for the parabola defined by the given quadratic function.f(x) = x2 + 2x - 6
A. (-1, -9) B. (2, 2) C. (1, -3) D. (-1, -7)
Factor the sum or difference of two cubes.27 - 125x3
A. (3 - 5x)(9 + 15x + 25x2) B. (27 - 5x)(1 + 15x + 25x2) C. (3 - 5x)(9 + 25x2) D. (3 + 5x2)(9 - 15x + 25x2)
Use the given table for y = ax2 + bx + c to solve ax2 + bx + c < 0 or ax2 + bx + c > 0, as indicated.y = -x2 + 7x - 11.25; ax2 + bx + c > 0
A. x < -4.5 or x > -2.5 B. 2.5 < x < 4.5 C. x < 2.5 or x > 4.5 D. -4.5 < x < -2.5