Answer:
0- 11 times
1,2,3,4,5,6,7,8,9- 12 times
28 rounds up to 30.
32 rounds down to 30.
21 rounds down to 20.
38 rounds up to 40.
42 rounds down to 40.
30 + 30 + 20 + 40 + 40 = 160
Answer: C. 160 min
₆C₃ is a combination. you can find this setting in the statistics menu of your scientific calculator (i think).
If you don't have a scientific calculator, you can use the following formula:
nCr = 
₆C₃ = 
= 
= 
= 
= 5 * 4
= 20
Answer: B
Are you trying to find the range?
<span>It is a line that touches only one point on the circle. Not so: that's a tangent line.
It is a line that joins a point on the circle with the center of the circle. Not so: that's a radius.
It is a line that divides the circle into two equal halves. Not so; that's a diameter.
It is a line that intersects the circle at two points. True.</span>
