Danielle drives from her home to the store at an average speed of 40 miles per hour. she returns home along the same route at an average of 60 miles per hour. what is her average speed, in miles per hour, for the entire trip

Circle a has a diameter of 7 inches, a circumference of 21.98 inches, and an area of 38.465 square inches. the diameter of circle b is 6 inches, the circumference is 18.84 inches, and the area is 28.26 square inches. part a: using the formula for circumference, solve for the value of pi for each circle. (4 points) part b: use the formula for area and solve for the value of pi for each circle. (4 points)