Lou painted 3/8 of his house in august, and he painted 2/5 more of the house in september. did lou paint more or less than 1/2 of his house in august and september ?

The tiles below are pieces of a normal ecg tracing representing a little less than two heartbeats at a resting rate of 80 bpm. arrange the tiles in their correct order. rank from first to last. do not overlap any tiles.

If 10 men take 18 days to mow 60 acres of grass, how long will 15 men take to mow 80 acres?

The weight of full–grown tomatoes at a farm is modeled by a normal distribution with a standard deviation of 18.4 grams. the 95 percent confidence interval for the mean weight of the tomatoes is calculated using a sample of 100 tomatoes. what is the margin of error (half the width of the confidence interval)?