00:01
So for a, you're just looking for the arc length, and that's a very simple equation.
00:06
It's just s is equal to r theta.
00:09
So basically, it's just plug and chug.
00:12
S is equal to 12 times 7 pi over 6.
00:18
And then this reduces.
00:22
So s is equal to 14 pi, which is equal to 43 .98 inches.
00:34
B is also pretty simple.
00:36
You look for a coterminal angle, that's less than 360 degrees.
00:40
So you start with 850, you subtract 360, and that'll get you 490.
00:48
This is a co -term, 490 is a coterminal angle, however it's not less than 360, so we have to subtract 360 again.
00:57
And then you get 130 degrees, and that is your answer for part b.
01:04
Now, part 2 is a little bit more tricky than part a and b.
01:11
So you have to convert the 25 miles per hour into feet per minute.
01:15
That's your first step.
01:16
So 25 miles.
01:19
And then i like to draw this little board...