If you have 20 oranges and a friend bought 10 more and gave then to you and you bought 10 more and then you divide the oranges for 3 friends. How many do each friend get? How many are left over?

Your friend swims on the school team. in his first four races, his times are 24.7, 23.5, 25.6, and 27.2 seconds. which time listed for his next race would make the range larger?

A) if $50000 is invested in a bank account that pays 9.3% of interest compounded on a six-monthly basis, how much money will be in the account after 3 and 12 years? b) if matusalen's father had put $2.0 in the bank when he was born and there, how long would matusalen have had to his death (969 years later) if the interest was 7% per year composed each month and weekly?

When a rectangle is dilated, how do the perimeter and area of the rectangle change?