The root of 6 corn plants had depths of -3.54 feet, -2 4/5 feet, 3.86 feet, -4 1/8 feet, -4.25 feet, and -3 2/5. how many corn plants had roots between 3 and 4 feet deep?

Really need on these. i have no idea what to do

Stacey filled her 1/2 cup of measuring cup seven times to have enough flour for a cake recipe how much flour does the cake recipe calls for

The patient recovery time from a particular surgical procedure is normally distributed with a mean of 5.2 days and a standard deviation of 1.7 days. what is the probability of spending more than 2 days in recovery? (round your answer to four decimal places.)