Dr. Jimenez found that after applying an antibiotic to bacteria, he observed only 90% of the bacteria left in the dish each hour. If the initial bacteria count was 100, what was the bacteria count after 5 hours? Round to the
whole number
There were
bacteria after 5 hours.

Let w=23 . what is the value of w + 45 ?

Kylie explained that (-4x+9)^2 will result in a difference of squares because (-4x+9)^2 (-4x+9)^2 =(-4x)^2+(9)^2=16x^2+81

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?