To answer this question we can propose the following equation:

Where:
x is the number of weeks elapsed.
d is the debt depending on the weeks.
Robert promised to pay at least $ 67 each week.
Therefore, after 5 weeks the debt of rober should be:


Then scenario A) is possible because
.
After 6 weeks:


Then scenario B) is possible because
.
After 7 weeks


Then scenario C) is possible because
.
After 8 weeks


So scenario D) is NOT possible because 
Finally the correct answer is option D.
Answer:
c
Step-by-step explanation:
Answer:
it would take 4 weeks to buy his computer
Step-by-step explanation:
2 weeks=324
the 50 cents in 2 weeks =100
210+324=523
523$ in 2 weeks
523+324=858
856$ in 4 weeks
add the 4 weeks of 50 cents.
50x4=200=2.00$
2.00+858=860$
tadaaaaaa
Step-by-step explanation: