20) Karrie traveled for 0.75 hours in her motorboat upstream to pick up her order of eighty-four watermelons, which people seem to only order in math problems. Coming back downstream later in the day, at the same boat speed, took her 0.5 hour. If the current in that part of the river is 6mph, what was her boat speed?

Upon arriving at the fair, Amari finds they have marked up the price of tickets from theprevious year. Last year, each ticket was $1.50. This year each ticket costs $3.00. What is thepercent change in cost of tickets from last year to this year? How many rides can Amari go on if each ride takes two tickets per ride?   Amari decides he will mow lawns over the next month to save up for more rides at the next carnival. For large yards Amari charges $30 and for small yards he charges $20. Amari makes $340 and mows 14 yardstotal. Set up an equation for this situation letting y be the number of large yards mowed. Howmany large yards did Amari mow?   Letting r be the number of rides Amari can go on, translate this situation to an inequality. At most, how many rides will Amari be able to go on with the money he made from mowing lawns?

Cato drinks 8 glasses of water each day. He will drink 2920 glasses of water in a year that had 365 days. Is the exact answer reasonable?

Ryan will spend at most $40 on gifts. So far, he has spent $22.What are the possible additional amounts he will spend?