Question

Help please with this one

Answer 1

Answer: 10.20 yd

Explanation:

h² + 5h - 155 = 0

a=1 b=5 c=-155

`x = \frac{-b +/- \sqrt{b^(2)-4ac}}{2a}`

`h = \frac{-5 +/- \sqrt{5^(2)-4(1)(-155)}}{2(1)}`

`h = (-5 +/- √(25+620))/(2)`

`h = (-5 +/- √(645))/(2)`

`h = (-5 +/- 25.40)/(2)`

`h = (-5 +25.40)/(2)` ,
`h = (-5 - 25.40)/(2)`

`h = (20.40)/(2)` ,
`h = (-30.40)/(2)`

h = 10.20 h = -15.20 (height can't be negative)