Find the angle between (2,2,1) and (3,6,-2)

What happens to the area as the sliders are adjusted? what do you think the formula for the area of a triangle is divided by 2?

The point a is at –2 and the point b is at 7. marissa would like to divide this line segment in a 4: 3 ratio, and she would like to use the formula x = (x2 – x1) + x1. what values should she substitute into the formula? a = a + b = x1 = x2 =

Sally deposited money into a savings account paying 4% simple interest per year.the first year,she earned $75 in interest.how much interest will she earn during the following year?