PLEASE HELP SOVOR THIS MATH PROBLEM!

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

For what values of the variable x is the expression square root of 7x+14+ square root of 7-x a real number?

Afrequency table of grades has five classes (a, b, c, d, f) with frequencies of 3, 13, 14, 5, and 3 respectively. using percentages, what are the relative frequencies of the five classes?