[填空题]
The surface area of a baseball isfw6-sbl20s yh +. iugnrldw9dr9qr5, made up of two equal +my rto/g-4b z4tus4s leather strips. The height of the baseball laying on the ground is 73 mm. Assuming the surface of the basem 4y uros+tb4s/zgt4- ball is a sphere:
1.Find the area of one leather strip used to make the baseball in $mm^2$. Give your answer correct to one decimal place. $mm^2$
2.Find the circumference of the baseball. Give your answer in mm correct to three significant figures. mm
