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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 $6.57 \times 10^{-4}$?
1. $\frac{1}{657}$
2. 0.000657
3. 65 700
4. -0.000657
2. ________ What is the solution for the exponential equation $4^{3x+5}=2^{4x-3}$?
1. 8
2. -10
3. $-\frac{2}{7}$
4. $-\frac{13}{2}$
3. ________ If $f(x)=2(3^{-x+3})$, what is the value of ‘$x$’ if $f(x)=\frac{2}{9}$?
1. $x=5$
2. $x=9$
3. $x=3$
4. $x=2$
4. ________ What is the result of expressing 37100000 in scientific notation?
1. $3.71 \times 10^2$
2. $3.71 \times 10^7$
3. $0.371 \times 10^3$
4. $3.71 \times 10^{-1}$
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 $y$-intercept of the exponential function $y=4(0.5)^6$?
1. $y=0.02$
2. $y=0.5$
3. $y=6$
4. $y=4$
7. ________ If the mean temperature in Phoenix is $94^\circ F$ and is expected to increase by 0.5% annually, what will be the predicted mean temperature in 20 years?
1. $98.8^\circ F$
2. $94.5^\circ F$
3. $118^\circ F$
4. $105^\circ F$
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 $7.8 \times 10^{-3} -4.6 \times 10^{-4}$?
1. $3.2 \times 10^{-1}$
2. $3.2 \times 10^{-7}$
3. $73.4 \times 10^{-3}$
4. $7.34 \times 10^{-3}$
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

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

## Date Created:

Jan 16, 2013

Jan 14, 2015
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