Aradioactive substance has an initial radioactivity level of 40 counts per second. after each week, the level of radioactivity is half of the
value of the level from the previous week. if this trend continues, which of the following graphs and equations represent the
radioactivity levels of the substance per week?

The first side of a triangle measures 5 in less than the second side, the third side is 3 in more than the first side, and the perimeter is 17 in. how long is the third side? if s represents the length of the second side, which of the following represents the length of the third side? s-5 ws-2 s+ 3 next question ask for turn it in

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)

Kyle cut a 4 foot piece of construction paper to be 6.1 inches wide by 8.2 inches long. what is the area of the piece of construction paper in square inches