Replace the Cartesian equation with an equivalent polar equation.2x + 3y = 6
A. 2 cos ? + 3 sin ? = 6r
B. r(2 cos ? + 3 sin ?) = 6
C. 2 sin ? + 3 cos ? = 6r
D. r(2 sin ? + 3 cos ?) = 6
Answer: B
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The amount remaining A, in grams, of a radioactive substance is a function of time t measured in years. The equation of change for A is
?
.
?
A: What can you conclude about the function 
?B: If there are initially 48 grams of the substance present, find a formula that gives A in terms of t. Write your answer using the alternative form for an exponential function.C: How long will it take before only 
of the original amount is left?
What will be an ideal response?
Find the axis of symmetry of the given function.y = 2x2 - 20x + 58
A. x = 5 B. x = 0 C. x = 8 D. x = -8
Solve using the principle of zero products.b(b + 17) = 0
A. 1, -17 B. 17, 0 C. -1,-17 D. -17, 0
Factor by grouping.r3 + r2 + 5r + 5
A. (r2 + 1)(r + 5) B. (r2 + 5)(r - 5) C. (r2 + 5)(r + 1) D. (r2 + 5)(r + 5)