Katie, elizabeth, and siobhan volunteer at the hospital. in a week, katie volunteers 3 hours more than elizabeth dpes and siobhan volunteers 1 hour less than elizabeth. over 3 weeks, the number of hours katie volunteers is equal to the sum of elizabeth's and siobhan's volunteer hpirs in 3 weeks.

What two criteria are needed for triangles to be similar

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)

An account with a $250 balance accrues 2% annually. if no deposits or withdrawals are made, which graph can be used to determine approximately how many years will it take for the balance to be $282? it's e2020 ni️️as