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Worksheets7-6 QUIZ - Common Logarithms
Total questions: 20
Worksheet time: 4hrs 48mins
Use the change of base rule to rewrite this problem:
log575
log(75)/log(5)
log(5)/log(75)
Solve: 2x = 25
Round to the nearest hundredth.
x = 4.64
x = 4.65
x = 1.40
x = 1.10
Solve: 9x-8 = 70
Round to the nearest hundredth.
x = 9.93
x = 1.93
x = 1.85
x = 9.85
Solve: 98-x = 27x-3
x = 5
x = -5
x = 1/5
x = -1/5
+/- 1.1691
+/- 1.8965
+/- 1.9901
+/1 1.2315
The base of common log is 10. So log 100 = ?
1
2
10
50
log 1000
1
2
3
4
log 0.1 =
-2
-1
1
2
log 1 =
-2
-1
0
1
Use a calculator to evaluate log 25
1.397
1.598
-1.397
.80
Samantha's hair was known to grow very rapidly. It began at a length of 6 in and grew at a rate of 14% a week.
A household appliance loses its value after it is purchased. Its current value, V(t), can be modeled by the function, V(t)= V0(3/4)t, where V0 is the original price, and t is the number of years. How long will it take for a refrigerator initial cost $850 to be worth $65? Round to the nearest year.
9 years
13 years
8 years
10 years
