Pls help! Thanks :)

A A car is traveling at a speed if keforneters of 42 mls a ) what is its speed in kelometers per hour ? b ) is it exceeding the 10kmth speed limit ? 2) what is the height in makers of a 3 foot 6:0 inch fall person ? 3 ) Tectonic plates are large segments of the Earthis crest that move slurry Suppose one such plate has an average speed of 4.6 am per year- a) kthat distance does it move in Seconds at this speed ? 10 ) Kihat is its speed in miles per million years ? 4 ) A Can contains assml of soda tho much is left after 334ml is removed express your answer to the correct member of sig fig $ proper units athow many sig fig are in the numbers 299-0 5 1000-0? 999.0 1000 . 0