Which equation represents the radius of a sphere as a function of the volume of the sphere?

Find the value of the cosine for angle a

Can some one explain this i got sent this. is this a threat i’m scared

The perimeter of a rectangular lot of land is 436 ft. this includes an easement of x feet of uniform width inside the lot on which no building can be done. if the buildable area is 122 ft by 60 ft, determine the width of the easement. select one: a. 9 feet b. 18 feet c. 4.5 feet d. 7 feet