.A) 100
B) 330
C) 900
D) 9.000

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### Math Test - Calculator - Problem 28

he mean distance, d, in micrometers, glucose travels in free solution in t seconds can be determined using the formula d = 10 . Which of the following gives the average speed of the glucose, in micrometers per second, over the first t seconds after it begins to move?
$$\begin{array}{l}{\text { A) } 10 t \sqrt{5 t}} \\ {\text { B) } \frac{10}{\sqrt{5 t}}} \\ {\text { C) } \frac{10 \sqrt{5 t}}{t}} \\ {\text { D) } \frac{100 \sqrt{5 t}}{t}}\end{array}$$

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### Math Test - Calculator - Problem 29

The scatterplot below shows spending, in billions of dollars, on DVD rentals and sales in the United States over a 10 -year period. Of the following equations, which best models the scatterplot?
$$\begin{array}{l}{\text { A) } y=-0.4339 x^{2}+5.6673 x+0.7685} \\ {\text { B) } y=0.4339 x^{2}+5.6673 x+0.7685} \\ {\text { C) } y=-0.4339 x^{2}-5.6673 x-0.7685} \\ {\text { D) } y=0.4339 x^{2}+5.6673 x-0.7685}\end{array}$$

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