The circle is in the middle of the rectangle.

what is the area of the unshaded portion of the figure?

use 3.14 to approximate for π .

enter your answer to the nearest tenth in the box.

Well first we have to find the area of the rectangle and the circle. Then we subtract the area of the circle from the rectangle. The area of the rectangle is length times width so 20*8.5=170. So the area of the rectangle is 170 cm^2 and now we have to find the area of the circle. To find the area of the circle, we have to find the radius and square it then multiply by pi. Based on the picture, we can tell that the diameter is 8.5 and the radius is half the diameter. So the radius is 4.25 and now we need to square it which is about 18.06. Now we take that and multiply by pi to get 56.71. Now we know that the area of the circle is 56.71 cm^2 so now we can subtract the area of the circle from the area of the rectangle. 170 - 56.71 = 113.29. Our answer is 113.29 cm^2. I hope this helps. Have a nice day!

that they are 200 mL of 70% and 100 mL of 40%

Step-by-step explanation:

We have to build a 2x2 system of equations with the information from the statement as follows:

0.70 * x + 0.4 * y = 300 * 0.6

x + y = 300 => x = 300 - y

where x is elixir 1 (70%) and y elixir 2 (40%).

replacing we have:

0.70 * (300 - y) + 0.4 * y = 300 * 0.6

210 * - 0.7 * y + 0.4 * y = 180

-0.3 * y = 180 - 210

y = -30 / -0.3

y = 100

now for x:

x = 300 - 100

x = 200

Which means that they are 200 mL of 70% and 100 mL of 40%