Aperson wishes to mix coffee worth $9 per lb with coffee worth $3 per lb to get 180lb of a mixture worth $5 per lb. how many pounds of the $9 and the $3 coffees will be needed?

Regular price is $77.00 and the discount is 5% find the sale price

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?

Determine the difference: 3.2 × 1010 – 1.1 × 1010. write your answer in scientific notation.