A-C
2013-02-08 09:09:29 UTC
–
–32
2. (–7.4)0 (1 point)–1
–7.4
0
1
3. –(5)–1 (1 point)
5
4.
(1 point)a2
2a
–a2
5. Write the number in expanded form.
4.02 x 105 (1 point)0.0000402
402,000
40,200,000
0.00402
What is each expression written using each base only once?
6. 9–8 · 9–2 · 910
(1 point)1
9160
729
27
7. 54 • 57 (1 point)12511
1511
528
511
8. (–5)–9 · (–5)10 (1 point)–5
1
519
19
What is the simplified form of the expression?
9. (k–2)9
(1 point)k18
10. (y–5)–10y10 (1 point)y–60
y60
y–60
y–150
11. (t8)2 (1 point)2t16
t10
t16
t64
What is the simplified form of each expression?
12. (–h4)5 (1 point)–h9
h1
h20
–h20
13. (6q6)–4 (1 point)6q1296
1,296q2
6q–24
For questions 14–15, what is the simplified form of the expression?
14. (1 point)10t16y16
15. (1 point)
16. A population of 800 cheetahs decreases by 13% per year. How many cheetahs will there be in the population after 5 years? Round your answer to the nearest whole number.
(1 point)1,474
399
735
347
17. What is the value of 10x–3y–1 for x = –1 and y = –3?
(1 point)10(3)–4
30
18. Find the simplified form of the expression. Give your answer in scientific notation.
(5 x 10–7) (8 x 10–4) (1 point)4 x 10–13
4 x 10–12
40 x 10–10
4 x 10–10
19. What is the simplified form of the expression?
(1 point)
k24
k8
k128
20. Suppose a population of 190 crickets doubles in size every month. The function f(x) = 190 · 2x gives the population after x months. How many crickets will there be after 1 year? (1 point)778,240 crickets
380 crickets
4,560 crickets
760 crickets
21. Suppose that the population of deer in a state is 16,600 and is growing 1% each year. Predict the population after 6 years. (1 point)about 99,600 deer
about 17,621 deer
about 16,600 deer
about 29,408 deer
Find the balance in the account.
22. $3,600 principal earning 4%, compounded annually, after 7 years (1 point)$58,982,400.00
$4,608.00
$4,737.35
$26,208.00
23. $3,200 principal earning 3%, compounded semi-annually, after 19 years
(1 point)$5,611.22
$125,248.00
$5,634.55
$4,246.24
24. A tractor costs $14,150 and depreciates in value by 11% per year. How much will the tractor be worth after 13 years? (1 point)$14,007.00
$3,110.47
$54,948.41
$2,768.32
25. What is the graph of the function?
(1 point)
26. Ken has decided to raise rabbits but has been warned that the number of rabbits he will have will double every month. Ken started out with 30 rabbits and the function y = 30(2x) models the number of rabbits he will have after x months. Which graph represents this function? (1 point)
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