(Write an equation and solve) The bill for coffee selling for $7/ib was $42. How many pounds of coffee were purchased

Hello i need some with trigonometric substitutions. [tex]\int\limits^a_b {x} \, dx[/tex]

There is diarrhea on the floor. what do i do? my mum gonna see that i diarrhea on the floor! * don't report, i'm serious! *

The lengths of nails produced in a factory are normally distributed with a mean of 4.91 centimeters and a standard deviation of 0.05 centimeters. find the two lengths that separate the top 4% and the bottom 4%. these lengths could serve as limits used to identify which nails should be rejected. round your answer to the nearest hundredth, if necessary.