UPPER AND LOWER BOUNDS
helen draws a random circle. she then measures its diameter and circumference. she gets a circumference, c, of 405 mm correct to 3 significant figures. she gets a diameter, d, of 130 mm correct to 2 significant figures. helen wants to find the value of π using the formula π=C/d calculate the lower bound and upper bound for helens value of π. give your answers correct to 3 decimal places.

I’m stuck on this i don’t understand.

What is the slope simplify your answer and write it as a proper fraction, improper fraction, or integer

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.