Your cell phone company has a reward club. for every three texts you send you get 20 points. you need 1800 point for a prize. how many texts do you need to send to get a prize

270

Step-by-step explanation:

Given: For every three texts you send you get 20 points.

Let x be the number of text need to send to score 1800 points.

Also the number of points is directly proportional to the number of texts,

Therefore,

Hence, we need to send 270 texts to get the prize.

After 9 years:

7,680

Step-by-step explanation:

4%=0.04

1 year = 12,000 x 0.04=480

9 years= 480 x 9 = 4320

12,000-4320= 7,680