A frog is in a well 12 feet deep, each day the frog climbs up 3 feet, and each night it slips back 2 feet, how many days will it take the frog to get out of the well

An apple farm yields an average of 45 bushels of apples per tree when 21 trees are planted on an acre of ground. Each time 1 more tree is planted per acre, the yield decreases by 1 bushel (bu) per tree as a result of crowding. How many trees should be planted on an acre in order to get the highest yield? In order to get the highest yield, trees should be planted on an acre. OCEED

If candies are sold at 3 pcs for 2 pesos? How many candies can Mark get if he has 30 pesos?

A patient needs two tablespoons of a liquid every 4 hours for 24 hours. How many tablespoons of the drug will the patient receive over a 24 hour period

If sara walks her dog every 3 days, and marsha walks her dog every 2 days, at the end of 60 days, how many days will they have walked their dogs together?

Two persons are to run a race, but one can run 9 meters per second, whereas the other can run 5 meters per second. If the slower runner has a 50-meter head start, how long will it before the faster runner catches the slower runner, if they begin at the same time?

thanks!!