A double ordinate of the parabola y^2=2ax is of length 4a . prove the lines joining the vertex to its ends are at right angles? ​

The fraction 7/9 is equivalent to a percent that is greater than 100%. truefalse

Petes dog weighed 30 pounds it then lost 16% of it's weight how much did pete lose

At noon a tank contained 10cm water. after several hours it contained 7cm of water. what is the percent decrease of water in the tank?