Lucas started off with $10.00. he gave away 20% of his money to his sister, and 30% of the remainder of his money to his brother. How much money did Lucas have after sharing with his sister and his brother

Ill mark the brainliest if you me with the these three questions 7,8,9

Which expression is rational? 6. , square root two, square root 14, square root 49

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)