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lions [1.4K]
3 years ago
15

3. A computer is worth $4000 when it is new. After each year it is worth half what it was the previous year

Mathematics
2 answers:
MrMuchimi3 years ago
7 0

Answer:

Answer is 500

btw did round sorry

Step-by-step explanation:

First year

4,000 divided by 2,000=2,000

Second year

2,000 divided by 2=1,000

Third year

1,000 divided by 2=500

Helga [31]3 years ago
4 0

*I know it's already been answered, but I just wanted to add a different version of the steps. While this particular question could be answered in like 3 seconds, this method is a lot quicker when they want you to find 30th term lol

Answer:

500

Step-by-step explanation:

First, set up your equation:

a<em>n </em>= a<em>1 </em>* r ^ (n-1)

a<em>1 </em>is 2000, because it is the first term (4000 is the 0th term).

4000*(1/2)=2000.

a<em>n </em>= 2000<em> </em>* (1/2) ^ (<em>n-</em>1)

Now, subsitute <em>n </em>for 3:

a3<em> </em>= 2000<em> </em>* (1/2) ^ (3-1)

Solve:

a3 = 2000 * (1/2) ^ 2

a3 = 2000 * 0.25

a3 = 500

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