Distances in space are measured in light-years. the distance from earth to a star is 6.8 × 1013 kilometers. what is the distance, in light-years, from earth to the star (1 light-year = 9.46 × 1012 kilometers)? (5 points)   2.66 light-years 7.18 light-years 7.74 light-years 9.46 light-years

Answer this 30 points and brainliest!

Will used 20 colored tiles to make a design in art class. 5/20 of his tiles were red. what is an equivalent fraction for the red tiles?

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