Estimate the sum or difference by rounding.

A. 266
B. 267
C. 250
D. 260


Answer: D

Mathematics

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Solve the problem. Unless stated otherwise, assume that the projectile flight is ideal, that the launch angle is measured from the horizontal, and that the projectile is launched from the origin over a horizontal surfaceA projectile is fired with an initial speed of 528 m/sec at an angle of 45°. What is the greatest height reached by the projectile? Round your answer to the nearest tenth.

A. 76.2 m B. 69,696.0 m C. 28,447.3 m D. 7111.8 m

Mathematics

Write the English phrase as an algebraic expression. Let x represent the number. Simplify the expression, if possible.20 less than a number

A. x + 20
B. x - 20
C.  
D. 20 - x

Mathematics

Solve the problem.If f(x) is a differentiable function and f ' (c) = 0 at an interior point c of f's domain, and if  for all x in the domain, must f have a local minimum at x = c? Explain.

What will be an ideal response?

Mathematics

Solve the equation. -  = 3

A. {2} B. {3, 8} C. {-2} D. {2, 38}

Mathematics