Predict the next 2 terms in the sequence. State whether the sequence is arithmetic, geometric, or neither. Justify your answer. 1. 4, -20, 100, -500

2. 3, 5, 8, 12

3. 64, 48, 36, 27

4. 1.5, 0.75, 0, -0.75

Rockwell hardness of pins of a certain type is known to have a mean value of 50 and a standard deviation of 1.1. (round your answers to four decimal places.) (a) if the distribution is normal, what is the probability that the sample mean hardness for a random sample of 8 pins is at least 51?

What expression is equivalent to (2x-1)(x-3)?

In the diagram, ab is tangent to c, ab = 4 inches, and ad = 2 inches. find the radius of the circle.