If a certain line intersects the x-axis at point A(2,0) and is perpendicular to the line with the equation y=-3x-7 at point B, what is length of AB?

Can someone check if i did this correct. it’s number 4 if you’re wondering.

(c) a vine called the mile-a-minute weed is known for growing at a very fast rate. it can grow up to 0.5 ft per day. how fast in inches per hour can the mile-a-minute weed grow up to? show your work using the correct conversion factors.

Leonardo wrote an equation that has an infinite number of solutions. one of the terms in leonardo’s equation is missing, as shown below.