Find an equation of variation for the given situation.y varies directly as the square of x, and y = 7.2 when x = 4.
A. y = 0.49
B. y = 0.5x2
C. y = 0.45x2
D. y = 2.02x2
Answer: C
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Decide which set of names would be most meaningful for the indicated items.On a bookshelf there are 4 math books, 5 science books, and 5 history books.
A. b1, b2, and b3 B. 4, 5, and 5 C. m, s, and h D. x, y, and z
Write the inverse of the statement.If the moon is out, then we will start a campfire and we will roast marshmallows.
A. If the moon is not out, then we will not start a campfire or we will not roast marshmallows. B. If the moon is not out, then we will start a campfire but we will not roast marshmallows. C. If we do not start a campfire or we do not roast marshmallows, then the moon is not out. D. If we start a campfire and we roast marshmallows, then the moon is out.
Solve the problem.The temperatures in parts of Antarctica in degrees Celsius roughly satisfy the inequality |C + 92| ? 53. What range of temperatures corresponds to this inequality?
A. [-145°C, 145°C] B. [-39°C, 39°C] C. [-145°C, -39°C] D. [-39°C, 145°C]
Given the polynomial function f(x), find the rational zeros, then the other zeros (that is, solve the equation 
), and factor f(x) into linear factors.f(x) = x3 - 75x - 250
A. -5, multiplicity 2; -10; f(x) = 
(x + 10)
B. -5, multiplicity 2; 10; f(x) = 
(x - 10)
C. -10, -5, 5; f(x) = (x + 10)(x + 5)(x - 5)
D. -5, 5, 10; f(x) = (x + 5)(x - 5)(x - 10)