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Chapter 7: Problem 9
If \(x^2=25\), which of the following is true? $$ \begin{aligned} & \bigcirc x=5 \\ & \bigotimes x=-5 \\ & \hdashline x=\pm 5 \\ & \text { idon't know. } \end{aligned} $$
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Which of the following is equivalent to \(x^{\frac{3}{2}}\) ? C \(\sqrt{x^3}\) \(\frac{3}{2} x\) \(\frac{x^2}{x^2}\) I don't know.
If \(a, b\), and \(c\) are distinct prime numbers, how many factors does abc have?
Which of the following expressions is equivalent to \(\frac{12 !}{15 !} ?\) $$ \begin{aligned} & \text { } \frac{\frac{4 \times 3 \times 2 \times 1}{5 \times 4 \times 3 \times 2 \times 1}}{\frac{1}{15 \times 14 \times 13}} \\ & \frac{4}{5} \end{aligned} $$ I don't know.
If \(-1
In 40 seconds, a mountain biker travels 230 feet. What is her speed in miles per hour? (Note: 1 mile \(=5280\) feet) $$ \begin{array}{r} \frac{230 \times 60 \times 60}{40 \times 5280} \\ \frac{230 \times 5280}{40 \times 60 \times 60} \\ \frac{40 \times 60 \times 60}{230 \times 5280} \\ \text { I don't know. } \end{array} $$
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