AzizHusain

c. -6 > -5 is false.

x^2 = 20

Take the square root of both sides:

x = sqrt(20) = sqrt4 * sqrt5 = 2*sqrt(5).

Note that -11 - 8 = -19 and we have + 19 so they cancel each other out leaving -6.

A constant is usually something like 0.0821 L*atm / mol*K - the universal gas constant.

A variable is something that can be solved for given specific information/constants. Like speed = distance / time. Given distance and time, our variable would be speed and we can solve for it easily since we have enough information. 

Is this -3*|-3|? If so, you know that the absolute value of -3 is 3 since the absolute value sign just makes everything positive. So -3*3 = -9.

Move the decimal place two times to the left --> 0.011.

Make sure to put 4*(3.14)(20*20) into the calculator located on the home page. 

Ex. 2*2*2 = 8

Since we have 3 2's, we can rewrite the previous expression as 2^3.

No, it does not.

Yep, they look all right. I think you shaded 1/2 differently. It should look like a square in the middle.