The tree is 7.5ft because it's shadow is half it's height.
<u>1</u> : 3
8
Make the whole number a fraction, by putting it over 1.
<u>1</u> : <u>3</u>
8 1
Turn the second fraction upside down and multiply:
<u>1</u> . <u>1</u> = <u>1 </u>
8 3 24
S = 1/24
You Pemdas - Parenthesis , Exponents ,
Multiplication , Division , Addition , And Subtraction , And Thats Should Help You Get Your Answer