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Log review

Total questions: 13

Worksheet time: 1hrs 18mins

Name
Class
Date
1.

log4(3x-1)=log4(2x+3)

a)

4

b)

3

c)

1

d)

8

2.

logx1000=3

a)

1

b)

10

c)

30

d)

3

3.

log8(4x+4)=2

a)

15

b)

12

c)

10

d)

3

4.

log81x = 3/4

a)

2

b)

3

c)

27

d)

81

5.
log5(4x-7)=log5(x+5)
a)
3
b)
12
c)
4
d)
7
6.
log (x - 1)  - log (x - 2)  = log 5
a)
7
b)
4/9
c)
9/4
d)
1/7
7.
Rewrite log28 = 3 in exponential form/
a)
28 = 3
b)
23 = 8
c)
32 = 8
d)
83 = 2
8.
log525 = ?
a)
2
b)
5
c)
125
9.

 log(m3n)\log\left(\frac{m^3}{n}\right)  

a)

logm-log3-logn

b)

3logm+logn

c)

3logm-logn

d)

3log(m-n)

10.

Solve the following for 'x';

log6(3x - 2) = log6(5x - 8)

a)

x = 3

b)

x = 2

c)

x = -1

d)

No Solution

11.

Suppose you deposit $1000 in an account paying 4% annual interest, compounded continuously. Use  A = PertA\ =\ Pe^{rt}  to find the balance after 10 years.

a)

$1491.82

b)

$5459.82

c)

$1040.81

d)

$2353.85

12.

FOOD PRICES At a wholesale food distribution center, the price of sugar has increased 6.3% annually since 1980. Suppose sugar cost $0.43 per pound in 1980 and this growth continues. What will a pound of sugar cost in 2017? Use y = a(1 + r)t and round to the nearest cent.

a)

$4.12

b)

$1.21

c)

$0.42

d)

$3.30

13.

CHEMISTRY A particular compound decays according to the equation y = ae–0.0736t, where t is in days. Find the half-life of this compound.

a)

about 9.1 days

b)

about 9.4 days

c)

about 6.8 days

d)

about 7.4 days