21,600 minutes because 1 hour equals 60 mins. while half in an hour is 30 mins. and 60 + 30 = 90 so you multiply 240 by 90 getting 21,600
If the given radius is 5 inches, then the circumference, C is 2pi r, or 2pi(5 inches) = 10pi inches. You MUST include pi in your calculation of C.
The answer for the equation is X=-36
You didn't attach anything, but this is how you should solve this equation: given an equation 
the solutions are
In your case, the values are 
. If you plug these values inside the solving formula, you have
So, the two solutions are 1 and 7
