Use the pythagorean theorem:
EF² +DF²=DE²
EF²=18²-12²=180
EF=√180
E is the answer.
Is that meant to be 10 to the power of 6?
Assuming it is it would be 10×10×10×10×10×10.
This equals 1,000,000 so the answer is C.
After 75% increase followed by a 33 1/2% decrease the net increased is 16.375%.
<u>Solution:</u>
Need to determine net percentage increase or decrease when a value is increased by 75% and then decreased by 
that is 33.5%.
Let’s assume initial value be represented by variable x.
Now there is decrease of 33.5%
Hence after 75% increase followed by a decrease the net increased is 16.375%.
So it would be 1.2=X-0.4 and solve to get your answer. Output means the y-intercepts.
Here you are trying to find the hypotenuse. So you would take
5^2 (five squared) plus 12^2 (twelve squared) and add them using the equation a^2+b^2= c^2. Now you square 5 and 12 to get 25 and 144. You add them together and get 169. Take the square root of 169 and c. The square root on c will cancel out the squared (to the power of two) part leaving you with just c. And the square root of 169 is 13. So c (the missing length) is 13. C=13.
