Does anyone know how to solve this ?

How can you construct perpendicular lines and prove theorems about perpendicular lines

What is the point of inflection for the function f(x)=2cos4x on the interval (0, pi/2)

Victor is a mechanic who wants to ensure he has enough funds during his old age. which account will be of benefit to victor? a. checking account b. savings account c. money market account d. individual retirement account