| |
| |
1. |
Business An analyst estimates that the computers his company just bought will depreciate at a rate of 25% per year. At this rate, approximately how long will it take a computer to depreciate to 30% of its original value? |
| |
|
A. |
3 years |
B. |
4 years |
| |
|
C. |
5 years |
D. |
10 years |
| |
|
Hint |
|
| |
2. |
Radioactivity The half-life of uranium-232 is 72 years. Find the approximate value of k in the formula y = nekt for uranium-232. Assume t is in years. |
| |
|
A. |
-0.0024 |
B. |
0.0012 |
| |
|
C. |
-0.0048 |
D. |
-0.0096 |
| |
|
Hint |
|
| |
3. |
A Mickey Mantle rookie card appreciates in value 2% every year. How much was it worth in 1990 if it is worth $35,000 in 2000? |
| |
|
A. |
$28, 712 |
B. |
$42,665 |
| |
|
C. |
$216,711 |
D. |
$5653 |
| |
|
Hint |
|
| |
4. |
A Mickey Mantle rookie card appreciates in value 2% every year. If it is worth $35,000 in 2000, when will it be worth $100,000? |
| |
|
A. |
2093 |
B. |
2053 |
| |
|
C. |
2043 |
D. |
2065 |
| |
|
Hint |
|
| |
5. |
Two cities have insect problems. The insects in City A increase exponentially according to the equation y = 120,000e0.04t. The insects in City B increase exponentially according to the equation y = 90,000e0.08t. When will the cities have an equal amount of insects? |
| |
|
A. |
at t = 3 years |
B. |
at t = 34.66 years |
| |
|
C. |
at t = 7.19 years |
D. |
at t = 7.89 years |
| |
|
Hint |
|
|
|