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>
The king of hearts in cards
First isolate the power of 10 on the right side by dividing both sides by 5:

Now you're free to take the logarithm and simplify where you can:

Then solve for
:

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