On average it takes samantha 18 mins with a standard deviation of 2 minutes to drive to school in the mornings how often will she arrive in less than 12 mins answer

Listed in the table is the percentage of students who chose each kind of juice at lunchtime. use the table to determine the measure of the central angle you would draw to represent orange juice in a circle graph

I'm confused on this could anyone me and show me what i need to do to solve it.

Extra points! find the missing dimension! need asap