Find an equation of a parabola satisfying the given conditions.Focus (9, 4), directrix x = -1
A. (y - 4)2 = 20(x - 4)
B. (x - 9)2 = 20(y - 4)
C. (x - 4)2 = 20(y - 4)
D. (y - 4)2 = 20(x - 9)
Answer: A
Mathematics
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Find an equation for the parabola described.Vertex at (6, 5); focus at (4, 5)
A. (x - 5)2 = 4(y - 5) B. (x - 5)2 = -4(y - 5) C. (y - 5)2 = 8(x - 6) D. (y - 5)2 = -8(x - 6)
Mathematics
Calculate the requested distance.The distance from the point S(6, 10, -8) to the line x = 2 + 3t, y = 5 + 4t, 
A. 
B. 
C. 
D. 
Mathematics
Divide and simplify.30 ÷ 
A. 
B. 150
C. 6
D. 
Mathematics
State whether the square root is rational or irrational. If the square root is rational, find the (exact) value. If the square root is irrational, estimate its value by rounding to the second decimal place.
A. Rational; 4 B. Irrational; 4.12
Mathematics