Slope intercept form of points 0, -4 and -1, 4

Find the area of a parallelogram with base 15 yards and height 21 2/3

What are the measures of angles a, b, and c? show your work and explain your answers. 25 points

The diameter of the moon is about 3500 km. approximate the surface area of the moon using the formula for the surface area of a sphere, s = 4? r^2. write your answer in scientific notation.