Convert 8 hours to minutes.

86 minutes
240 minutes
480 minutes
640 minutes

 480  minutes.

Step-by-step explanation:  I  am  led  to  believe  that  the way  to  convert  minutes  to  hours  is  to  divide  the  number  of  minutes  by  sixty.  Therefore,  completing  the  process  in  reverse  must  have  the  opposite  effect.  It's  a  somewhat  time  consuming  way  to  double  check  your  answer  and  I'm  sure  someone  else  could  come  up  with  a  faster  one.  Good  luck!

1 number

if we use a graphing calculator, there is only one such number that satisfies the conclusion of the mean value theorem, that is, a number such that

where the right-hand side is the average rate of change of f on the interval [0.5,0.75], which is the slope of the secant line.

in the attached graph, the black line is the secant line which has its slope as the average rate of change of f on [0.5,0.75], while the orange line is the only tangent line to the graph of f in the interval that satisfies the mvt conclusion.