What is the value of s? 0.7(3s+4)−1.1s=7.9

On a piece of paper graph f(x)=5•(0.4)^x

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?

Find the number of liters in 12.8 gal of gasoline. round to the nearest hundredths