A statistics firm obtains a list of all cars in the U. S. that are registered with state DMV offices and randomly selects 81 cars from the list. For this sample, the average weight is found to be 2919 pounds with a standard deviation of 540 pounds. Calculate the 90% confidence interval for the parameter of interest and interpret it.

Find the area and perimeter of each composite figure. use 3.14 for π. round your answer to the nearest tenth. a square and a right triangle share a common side. image long description a 3-meter by 0.5-meter rectangle has triangles attached like wings to the 3-meter sides. the other two sides of both triangles measure 2.5 meters. the height of each triangle is 2 meters. a 6-inch by 4-inch rectangle has 2 half-circles attached like wings to the 6-inch sides. the radius of each half-circle is 3 inches. find the surface area and volume of each figure. use 3.14 for π. round your answer to the nearest tenth. a right circular cylinder has a base radius of 6 yards and a height of 20 yards. a rectangular prism has a base that is 9 centimeters long and 7 centimeters wide. the height is 2 centimeters. a rectangular prism has a base that measures 11 millimeters by 11 millimeters. the height is 11 millimeters.

1.based of the diagrams what is the the value of x? 2.how would you verify your answer for x

Which statement best describes how to determine whether f(x) = x squared- x +8 is an even function ?