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# 6.7: Quiz II

Difficulty Level: At Grade Created by: CK-12

Multiple Choice – Please circle the letter of the correct answer and write that letter in the space provided to the left of each question.

1. ________ What is the standard form of 6.57×104\begin{align*}6.57 \times 10^{-4}\end{align*}?
1. 1657\begin{align*}\frac{1}{657}\end{align*}
2. 0.000657
3. 65 700
4. -0.000657
2. ________ What is the solution for the exponential equation 43x+5=24x3\begin{align*}4^{3x+5}=2^{4x-3}\end{align*}?
1. 8
2. -10
3. 27\begin{align*}-\frac{2}{7}\end{align*}
4. 132\begin{align*}-\frac{13}{2}\end{align*}
3. ________ If f(x)=2(3x+3)\begin{align*}f(x)=2(3^{-x+3})\end{align*}, what is the value of ‘x\begin{align*}x\end{align*}’ if f(x)=29\begin{align*}f(x)=\frac{2}{9}\end{align*}?
1. x=5\begin{align*}x=5\end{align*}
2. x=9\begin{align*}x=9\end{align*}
3. x=3\begin{align*}x=3\end{align*}
4. x=2\begin{align*}x=2\end{align*}
4. ________ What is the result of expressing 37100000 in scientific notation?
1. 3.71×102\begin{align*}3.71 \times 10^2\end{align*}
2. 3.71×107\begin{align*}3.71 \times 10^7\end{align*}
3. 0.371×103\begin{align*}0.371 \times 10^3\end{align*}
4. 3.71×101\begin{align*}3.71 \times 10^{-1}\end{align*}
5. ________ If Maria invested $200 in a savings bond that appreciates 8% compounded annually, how much money will she have at the end of 10 years? 1.$631.78
2. $216.59 3.$431.78
4. \$416.59
6. ________ What is the y\begin{align*}y\end{align*}-intercept of the exponential function y=4(0.5)6\begin{align*}y=4(0.5)^6\end{align*}?
1. y=0.02\begin{align*}y=0.02\end{align*}
2. y=0.5\begin{align*}y=0.5\end{align*}
3. y=6\begin{align*}y=6\end{align*}
4. y=4\begin{align*}y=4\end{align*}
7. ________ If the mean temperature in Phoenix is 94F\begin{align*}94^\circ F\end{align*} and is expected to increase by 0.5% annually, what will be the predicted mean temperature in 20 years?
1. 98.8F\begin{align*}98.8^\circ F\end{align*}
2. 94.5F\begin{align*}94.5^\circ F\end{align*}
3. 118F\begin{align*}118^\circ F\end{align*}
4. 105F\begin{align*}105^\circ F\end{align*}
8. ________ For the following values of an exponential function, what is the common ratio? (0,2.5); (1,2.97); (2,3.54); (3,4.2); (4,5.01)
1. 0.84
2. 2.5
3. 1.19
4. 0.47
9. ________ What is the result of 7.8×1034.6×104\begin{align*}7.8 \times 10^{-3} -4.6 \times 10^{-4}\end{align*}?
1. 3.2×101\begin{align*}3.2 \times 10^{-1}\end{align*}
2. 3.2×107\begin{align*}3.2 \times 10^{-7}\end{align*}
3. 73.4×103\begin{align*}73.4 \times 10^{-3}\end{align*}
4. 7.34×103\begin{align*}7.34 \times 10^{-3}\end{align*}
10. ________ The population of 978 students at a high school depreciates by 8% each year. If this continues, how many students will be in attendance 6 years from now?
1. 256
2. 593
3. 722
4. 385

## Answers to Quiz II

1. B
2. D
3. A
4. B
5. C
6. D
7. A
8. C
9. D
10. B

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