How many terms are in the polynomial abcd + e - h 2?

Can someone me my sister? she is in third grade. 50 points and brainlist! ones that are not answered. plz and thx!

The ratio pv to nrt is plotted against pressure for ch4 at 0°c and 200°c. why does the curve for 0°c drop below the horizontal line for an ideal gas whereas the curve for 200°c does not?

If you are just building your payment history, how many points from a perfect score will you possibly miss?