Diagram 6(c) shows triangle PQR. The shaded part is a rectangle with area 108 cm². Given the height of the triangle PQR is twice the height of rectangle. Find the perimeter of traingle PQR.
P
30 cm
Q
►R
12 cm
Diagram 6(b)

Suppose that 3% of all athletes are using the endurance-enhancing hormone epo (you should be able to simply compute the percentage of all athletes that are not using epo). for our purposes, a “positive” test result is one that indicates presence of epo in an athlete’s bloodstream. the probability of a positive result, given the presence of epo is .99. the probability of a negative result, when epo is not present, is .90. what is the probability that a randomly selected athlete tests positive for epo? 0.0297

Use circumcenter theorem to solve for the given values

Acertain volume of water contains 100000 hydrogen atoms and 50,000 oxygen atoms how many hydrogen atoms are in a volume of water containing 4 million oxygen atoms