6· [10pts] a 300-gal tank initially contains 100 gal of brine containing 30 lbs of salt. brine containing 1 lb of salt per gallon enters the tank at the rate of 6 gal/s, and the well-mixed brine in the tank flows out at the rate of 4 gal/s. how much salt will the tank contain when it is full of brine? it's the question about elementary differential equation. provide specific solution and explanation with clear handwriting.

Afactory makes propeller drive shafts for ships. a quality assurance engineer at the factory needs to estimate the true mean length of the shafts. she randomly selects four drive shafts made at the factory, measures their lengths, and finds their sample mean to be 1000 mm. the lengths are known to follow a normal distribution whose standard deviation is 2 mm. calculate a 95% confidence interval for the true mean length of the shafts. input your answers for the margin of error, lower bound, and upper bound.

The scatterplot below shows the number of hours that students read weekly and the number of hours that they spend on chores weekly. which statement about the scatterplot is true?

What is the solution to the equation e3x=12? round your answer to the nearest hundredth