Answer:
15
Step-by-step explanation:
25 percent of 20 is 5, and 20-5 equals 15.
In a group of 20 students, 15 do not wear glasses.
14x - 3 = 10x + 1
4x = 4
x = 1
The Answer is 62π or 194.77874452256718078468388976333.
Step-by-step explanation: To find the circumference of a circle, you need to multiply the diameter by π. The equation is 2πr.