Tell whether a linear model or a quadratic model is appropriate for the data. If a quadratic model is appropriate, then decide also whether the lead coefficient should be positive or negative.The amount of water in a pool as it is being filled, as a function of time.
A. Quadratic; leading coefficient negative
B. Quadratic; leading coefficient positive
C. Linear
Answer: C
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Solve the problem.Mrs. Bollo's second grade class of thirty students conducted a pet ownership survey. Results of the survey indicate that 8 students own a cat, 15 students own a dog, and 5 students own both a cat and a dog. How many of the students surveyed own no cats?
A. 27 B. 15 C. 10 D. 22
Solve the problem.Find the average distance from a point 
in the region bounded by 
to the origin.
A. 
B. 
C. 
D. 
Write the number in decimal form.2.95 × 105
A. 295,000 B. 147.5 C. 2,950,000 D. 29,500
Rewrite the expression as the sum and/or difference of logarithms, without using exponents. Simplify if possible.log19
A. 
log195 - 2 log19y - 2 log19x
B. 6 log195 - 2 log19y - log196
C. log195 - log19y - log19x
D. 
log195 - 2 log19y - log19x