Dakota built a wall with bricks like this one: look at dakota’s wall: what is the length of the side of the brick labeled a?what is the length of the side of the brick labeled b?what is the total height of the wall?what is the total length of the wall?

I don't know if i'm right but I think the first question is 5 inches, the second question is 8 inches, the third question is 24 inches because there are three blocks and each are 8 inches so 8 x 3 = 24, and the last question is 45 inches because there are 9 bricks each 5 inches on the top so 9 x 5 = 45. (again I am not sure if this is correct but it is what I think)

"When a minus sign occurs with exponential notation, a certain caution is in order. For example, (-4)2 means that -4 is to be raised to the second power. Hence (-4)2 = (-4) * (-4) = 16. On the other hand, -42 represents the additive inverse of 42. Thus -42 = -16. It may help to think of -x2 as -1 * x2 ..."[1]