Answer:
10
Step-by-step explanation:
1.25 each song
she bought 8 songs
1.25 x 8 = 10
10-20 = 10
Answer:
See below
Step-by-step explanation:
The number you described is the same as 
where the sine of an angle is the ratio between a right triangle's opposite side to the angle and the hypotenuse. So, in this case, if we had a right triangle with a height of 
units and a hypotenuse of 2 units, the ratio between the two sides will result in the value you provided. This right triangle in particular would be a 30-60-90 triangle.
In the case of a unit circle, it’s the y-coordinate of the point where a 60° angle in the standard position intersects a unit circle and a right triangle is created from that.
This is not a proper question.
Answer:
40 total rocks
Step-by-step explanation:
100 * 36 / 90 = 40
