Find the probability.One digit from the number 5,282,772 is written on each of seven cards. What is the probability of drawing a card that shows 5, 2, or 8?
A. 
B. 
C. 
D. 
Answer: C
Mathematics
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Sketch the given surface.z = x2 + 4y2
What will be an ideal response?
Mathematics
Solve.4x + 3y + z = -282x - 4y - z = 153x + y + 4z = -18
A. (-3, -5, -1) B. (-1, -5, -3) C. No solution D. (-3, -1, -5)
Mathematics
Solve the problem.A person standing close to the edge on top of a 304-foot building throws a baseball vertically upward. The quadratic equation 
models the ball's height above the ground, 
in feet, t seconds after it was thrown. How many seconds does it take until the ball finally hits the ground? Round to the nearest tenth of a second if necessary.
A. 6.8 seconds B. 2 seconds C. 2.8 seconds D. 368 seconds
Mathematics
Estimate the sum or difference by rounding each number to the nearest ten.
A. 60 B. 40 C. 30 D. 31
Mathematics