D: because if you take 9.50-7.50=2 you would get p=price or the price of the pen.
Hope I helped=)

so... you tells us, which filling rate is the bigger and thus faster one?
Answer:
YES
Step-by-step explanation:
YPU
Answer: w, 0
Step-by-step explanation:
you can see that G has the same distance from 0 as E does, so you can just take away the - sign. It hasn't left the line so its still 0.
Answer:
Step-by-step explanation:
Investment = $5,000
Annual Interest = 5%
5000/100 x 5/1
50×5 = 250
First year interest = $250
Therefore, 250 x 20
= $5,000
It will take him 40 years.