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 Helen's value of π. Give your answers correct to 3 decimal places.

Will mark the brainliest answer

Which statement accurately describes how to perform a 90° clockwise rotation of point a (1,4) around the origin?

Aculinary club earns $1360 from a dinner service. they sold 45 adult meals and 80 student meals. an adult meal costs twice as much as a student meal. what is the cost of an adult meal?

Going from point a to point b, the cheetah traveled at an average rate of 70 mph. returning to point a, the cheetah traveled at an average rate of 40 mph. can we say that this cheetah’s average rate was 55 mph? uchet write an equation for the average rate for the trip. remember, the cheetah runs from point a to point b and back to point a. first leg of trip: second leg of trip: ⦁ the following equation represents the average rate for the trip. is this equation equivalent to the one you wrote above? explain why or why not.