The following are the ages (years) of 5 people in a room: 23, 19, 12, 21, 13 A person enters the room. The mean age of the 6 people is now 19. What is the age of the person who entered the room?

Aquadratic function f(x) has a turning point at (3,-7). what is the turning point of -f(x)?

Omar is going on a road trip! the car rental company offers him two types of cars. each car has a fixed price, but he also needs to consider the cost of fuel. the first car costs $90 to rent, and because of its fuel consumption rate, there's an additional cost of s0.50 per kilometer driven.

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)