Step-by-step explanation:
Miles travelled in 1h=66600
Miles travelled in 1 sec=66600/3600
=18.5miles
Miles travelled in 15 seconds =18.5×15
=<em><u>277.5miles</u></em>
It's 10 - 4
moving decimal over to the right makes a negative exponent.
<span>60,000 converted into tons is
"30"
Hope this helps!</span>