A realtor is paid $24 per hour and $20 for each sale she makes. She wants to earn $2,000 in a 10-hour work period. Write an equation that represents the number of sales, x, the saleswoman must make in a 10-hour period to earn $2,000. How many sales must she earn to reach her goal?

What statement is true? 2x^2-9x+2=-1

Apinhole camera is made out of a light-tight box with a piece of film attached to one side and pinhole on the opposite side. the optimum diameter d(in millimeters) of the pinhole can be modeled by d=1.9[ (5.5 x 10^-4) l) ] ^1/2, where l is the length of the camera box (in millimeters). what is the optimum diameter for a pinhole camera if the camera box has a length of 10 centimeters

You are standing next to a really big circular lake. you want to measure the diameter of the lake, but you don't want to have to swim across with a measuring tape! you decide to walk around the perimeter of the lake and measure its circumference, and find that it's 400\pi\text{ m}400? m. what is the diameter dd of the lake?