Answer:
that is the answer. you can't simply any more
Step-by-step explanation:
Percent is parts out o 100
42.5%=42.5/100=0.425
'of' means multiply
20.57 is 42.5% of ? means
20.57=0.425 times ?
divide both sides by 0.245
48.4=?
20.57 is 42.5% of <u>48.4</u>
Answer:

Step-by-step explanation:
Please refer to the attachment.
By AA Similarity, the two triangles are similar.
Therefore, corresponding parts of them are proportional.
Therefore, we can write the following proportion:

We will solve for x. Cross-multiply:

Distribute:

Subtract 21 from both sides:

Divide both sides by 7. So, the value of x is:

However, that is only the value of x.
The shadow of the tree is (x+3).
Hence, we will need tot add 3 to our value. Therefore, the actual length of the shadow of the tree is approximately:

Y-3.6=x^2
y=x^2+3.6
x=1, y=4.6
x=3,y=9.6
x=5,y=28.6
x=6,y=39.6
x=9,y=84.6