a rectangular field is to be covered on three sides leaving a side of length 20m uncovered. if the area of the field is 600m2. how many metres of fencing is required?

How can you decide witch operations to use to slice a two step equation

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?

The volume of a sphere is increased by 6%. calculate the corresponding percentage increased in it area.