Answer:
0.01p + 0.05n > 40
0.01p + 0.05n < 20
Step-by-step explanation:
it has to be MORE (greater) than 40
it has to be LESS than 20 coins
hope this helps
not sure if you have to write the second equation, so sorry if it's wrong. :)
I think its 2 hours 30 minutes
remember: tan(theta) = opposite/adjacent
50% off of y
