What is the circumference of a circle with a radious of 7?

True or false? a circle could be circumscribed about the quadrilateral below.

A33 gram sample of a substance that's used to detect explosives has a k-value of 0.1473. n = noekt no = initial mass (at time t = 0) n = mass at time t k = a positive constant that depends on the substance itself and on the units used to measure time t = time, in days

Which of the following circles have their centers in the third quadrant?