A wheelchair ramp in front of a local restaurant has a length of 21 feet, measured from the foot of the ramp to the door. The horizontal distance from the foot of the ramp to the door is 20.7 feet. To the nearest tenth of a foot, how high is the top of the ramp off the ground? 3.0 feet
3.3 feet
3.5 feet
4.0 feet

The depreciation per unit for a company

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?