Which expression is equivalent to 28(15+9) ?
28 + 15 x 28 +9
28 x 15 +9
28 + 15 + 28 +9
28 x 15+28 x 9

Use the radius you found in part i (r=26.8 cm) with the surface area formula below to find the surface area of the sphere. show your work and round your answer to the nearest tenth. the surface area of a sphere: sa = 4πr^2 self note: 3.8.4

Name each raycalculation tip: in ray "ab", a is the endpoint of the ray.

The fence around a quadrilateral-shaped pasture is 3a^2+15a+9 long. three sides of the fence have the following lengths: 5a, 10a-2, a^2-7. what is the length of the fourth side of the fence?