1 mile = 1609.344 meters
1 hour = 3600 seconds 345.48 miles per hour x 1609.344
meters/mile x 1hour/3600seconds = 154.44 meter per second~~ANSWERR
C because
Explanation Plato
Hi sorry
I don’t know
but maybe next time
(4) HBr and H2SO4 is the correct answer.
Hope this would help~