Mark has $500 in his savings account. If he saves $25 each month, how money months will it take him to have $1000?

Me because some of question i don’t understand

Can someone me and plz do the problem

Liz is shipping a package to her friend.the maximum weight of a medium flat-rate box is 20 pounds,including the box which weighs 6 ounces.write and solve an inequality to describe the possible weight ,w, of the contents that liz will ship to her friend if she must use a medium flat-rate box.