Find the average speed of a helicopter that covers 800 km in 2 hours

A submarine dives 270 feet below the ocean's surface. It then rises 90 feet, rises another 40 feet, and finally dives 55 feet. What action is required by the submarine to get back to the surface?

A gift shop sels reproductions of a statue in two sizes. The 3-inch model has a scale of 1 inch to 4 feet. The other has a scale of 1 inch to 1.25 feet. How tall is the second model

The vertices of triangle QRS have coordinates Q (1, - 2), R (3, - 2), and S (2, - 4). Which coordinates are the coordinates of the vertices of triangle QꞌRꞌSꞌ when triangle QRS is reflected across the x-axis? A.

Mary Beth has two hula-hoops with diameters of 24 inches and 28 inches. What is the best estimate of the difference between their circumferences

What is the no solution and the infenetley many solution for the equation y=4x-18

The manager of a sawmill wants to find out what percentage of the boards that the mill produced are defective. Which sampling methods are likely to be biased? Choose all answers that are correct. A.

A nickel pyramidal paper weight has a square base of sides 5 cm and a height of 3 cm. What is the mass of a dozen such paper if the mass of 1 cm3 of nickel is 8.9 g?'

a sample of 49 observations is taken from a normal population with a standard deviation of 10. the sample mean is 55. Determine the 99% confidence interval for the population mean.

Which of the following are properties of right triangles? 1. The square of the hypotenuse is equal to the sum of the squares of the other two sides 2.

21717 in expanded form