Find an equation of variation for the given situation.y varies directly as the square of x, and y = 4.95 when x = 3.

A. y = 0.6x2
B. y = 2.12x2
C. y = 0.59
D. y = 0.55x2


Answer: D

Mathematics

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Solve.The function A = A0e-0.00693x models the amount in pounds of a particular radioactive material stored in a concrete vault, where x is the number of years since the material was put into the vault. If 700 pounds of the material are placed in the vault, how much time will need to pass for only 231 pounds to remain?

A. 320 years B. 160 years C. 170 years D. 165 years

Mathematics

Find all points where the function is discontinuous.

A. x = 1 B. x = 0, x = 1 C. None D. x = 0

Mathematics

Find the absolute value of the quantity.9 - 20

A. 11 B. -29 C. 29 D. -11

Mathematics

Graph the function. Describe its position relative to the graph of the indicated basic function.f(x) = log3(x - 4); relative to f(x) = log3x

A. Moved left 4 units

B. Moved right 4 units

C. Moved left 4 units

D. Moved right 4 units

Mathematics