The variable of interest would be whether or not their eyes were affected.
Variables of interest are like independent variables, they are the variable that you are testing for change.
Answer: 324 trees
Explanation: (cross multiply and divide)
In a fraction put x over 450 then next to it put 72 over 100 hundred
Cross multiply
72x450=32,400
100x= 32,400 (Divide each side of equation by 100)
X= 324
-OR- Just multiply 450 by .72
Either way you get the same answer. Hope this helped:)
1 pound × 40,000 = 40,000 pounds.
Please mark as brainliest. I really need it.
Use the distance formula
D=square root (x2-x1) + (y2-y1)
Answer:

Explanation:
Simplify both sides of inequality
-2 / 3 > 1 / 5 z
Flip equation
1 / 5 z < -2 / 3
Multiply both sides by 5
(1 / 5 z) 5 < (-2 / 3) 5
Z < -10 / 3