Uma indústria estima que 750 peças podem ser vendidas se forem ofertadas a R$ 40,00 cada e que, para cada R$ 1,25 de aumento no preço da peça, duas peças a menos serão vendidas. Expresse a renda R como uma função do número n de aumentos de R$ 1,25 para cada peça.

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?

When solving this problem: 3025/5.5 = a/90.75 you get 49912.5 which would be the length of one of the sides of a square when the area is only 90.75 inches. is that answer correct, why, and how is it possible?

What is the measure of one interior angle of a pentagon