What is the following sum - see attached (really need )

What is the best reason for jacinta to have a savings account in addition to a checking account

What is the correlation coefficient between the variables? round to three decimal places. enter your answer in the box

How do i start to solve? would appreciate a walk-thru! a bird sitting 16ft above the ground in an apple tree dislodges an apple. after how many seconds does the apple land on the ground? (assuming that no branches will interfere with it's fall)