The probability of the door opening within three attempts is the answer. C
Three quarters are 3/4 of a dollar.
<h2>
Answer:</h2>

<h2>
Step-by-step explanation:</h2>








<em>I hope this helps you</em>
<em>:)</em>
First you need to find the r, if C=2pieR, than 2.4=2pieR now you divide 2.4 by 2 so you got 1.2=pieR now you divide 1.2 by pie and obtained aproximately 0.38 miles, that is your R, now you do pie multiply by 0.38 exposant 2 and there you go, your answer is aproximately 0.45 miles2 :)