The joule is an example of units of work. which of the following is not a valid unit of work? ft-lb (kg-m2)/s2 inch-ton lb/s2

The "lb/s² " is not a valid unit of work.

Each of the others is (a unit of force) x (a unit of distance) which is pretty much the definition of work.

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