A groundskeeper needs grass seed to cover a circular
field, 290 feet in diameter.
A store sells 50-pound bags of grass seed. One pound
of grass seed covers about 400 square feet of field.
What is the smallest number of bags the
groundskeeper must buy to cover the circular field?
Explain or show your reasoning.

Hint: You can only buy WHOLE bags of grass seed so
you MUST round up!