Why is the sunspot cycle carefully monitored from earth?

what is the speed of a softball that travels 20m in 2secs

speed = 20/2 = 10 m/s

the old price per ounce is c/4.

the new price per ounce is c/3.6.

the ratio of the old price to the new one is

(c/4)/(c/3.6) = (c/c)×(3.6/4) = 0.9 . . = 9/10 . . "nine tenths" in either form

this would be about 43%

answercollision;