scribepost for january 6 , 09

7. what is the height of the wheel chair ramp?give your answer to the nearest tenth of a centimetre .

c squared - b squared = a squared

80 squared - 79 squared = a squared

(80x80)- (79x79)= a squared

6400- 6241 = a squared

159 = a squared

square roots of 159 = square roots of a squared

a squared = 12.6cm

the wheelchair ramp would be 12.6cm tall