Which of the following is an rational number? A. The Square Root of 68
B. Pi
C. The Square Root of 144
D. The Square Root of 21

21 type the correct answer in the box. use numerals instead of words. if necessary, use / for the fraction bar. the solution set of n2 - 14n = -45 is { (separate the solutions with a comma)

Find the magnitude, correct to two decimal places, made by each of the following with positive direction of the x axis a) y= x the answer is 45° but i don’t know how

An object in geometry with no width, length or height is a(n):