Mark simplified three over five divided by five over eight.; his work is shown below. Identify where he made his error. Original division problem: three over five divided by five over eight.

Step 1: three over five multiplied by eight over five.

Step 2: three times eight over five times five.

Step 3: twenty-four over five.

Step 4: four and four over five.

Step 1
Step 2
Step 3
Step 4

Which expression is equivalent to? assume x > 0 and y > 0.

Sheila wants to bake six muffins but the recipe is for 12 muffins . this means you only need half of the ingredients listed how much of the of each ingredient does she need? one cup and banana chips ,7 tablespoons oil , two eggs, 3/4 cups flour 1/4 cup walnuts show all you work and justify your answer using a baby toulmin.

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.