20% of 500 is 100, so take 100 off 500, which is 400. So, $400.
Answer:
i believe the answers are C and A
Step-by-step explanation:

Recall the half-angle identity:

So in order to find

, we only need to know the value of

. But there are two possible values. To decide which to take, we use the given information: we know that

lies in quadrant III, which means

, so

, which places

in quadrant II. In this quadrant, the sine of angle is positive, and so


is an angle of a ray whose terminal point,

lies on the circle

. The

-coordinate is all we need to know in order to find that

. So,
Step-by-step explanation:
2x^2 - 4x - 8 = 0
x^2 - 2x - 8 =0

30÷5 (the 5 parts from 2:3) is 6 so the first group gets 12 (2x6) and the second gets 18 (3x6)