A 8 gram sample of a substance that's a by-product of fireworks has a k-value of 0.101. Find the substance's half-life, in days. Round your answer to the nearest tenth.

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?

Which point is a solution to y s 4x + 5?

The square pyramid has a volume of 441 cubic inches. what is the value of x? 1/7x is the height x is the base