Why isn't nuclear fusion used to generate electric energy in power plants? O A. It requires extremely high temperatures.
O B. It generates radioactive waste.
O C. It uses a very rare element.
D. It releases less energy per gram than coal does.

find the surface area of the sphere to the nearest square unit. use a calculator.

a. 254 in.2

b. 64 in.2

c. 127 in.2

d. 1,018 in.2

not too sure thinking all accelerations are pointed down

the answer is c. the lower legs are levers, and the knees are fulcrums. the ankles hold the loads.