Part A: What proportion of dolphins in the sample have arsenic levels classified by the marine biologist as unhealthy? (4 points)

Part B: The mean aresenic level of the 28 dolphins in the sample is 5.26 parts per million and the standard deviation is 1.49 parts per million. Construct and interpret a 99% confidence interval for the mean arsenic level of dolphins in the region. (6 points) (10 points)

An airplane consumes fuel at a constant rate while flying through clear skies, and it consumes fuel at a rate of 64 gallons per minute while flying through rain clouds. let c represent the number of minutes the plane can fly through clear skies and r represent the number of minutes the plane can fly through rain clouds without consuming all of its fuel. 56c+64r < 900056c+64r< 9000 according to the inequality, at what rate does the airplane consume fuel while flying through clear skies, and how much fuel does it have before takeoff? the airplane consumes fuel at a rate of gallons per minute while flying through clear skies, and it has gallons of fuel before takeoff. does the airplane have enough fuel to fly for 60 minutes through clear skies and 90 minutes through rain clouds?

How do i put 3(x+7) in distributive property

How does reflecting or rotating a figure change the interior angles of the figure?