To multiply (6x + 5) (6x – 5), you can use the pattern:
(a + b) (a - b) = a2– b2
What are the values of a and b?
Enter your answers in the boxes below.

Acentral angle measuring 160 degrees intercepts an arc in a circle whose radius is 4. what is the length of the arc the circle formed by this central angle? round the length of the arc to the nearest hundredth of a unit. a) 4.19 units b) 6.28 units c) 12.57 units d) 12.57 square units