a local grocery store tested spinach samples for e coli bacteria using two different tests. the first test has a 94% probability of giving accurate results, while the second test is accurate 89% of the time. a sample that contains e coli bacteria is tested.
the probability that both tests detect the bacteria is
%.

the law of definite proportions states samples of a compound will always contain the same proportion of elements by mass. in other words, a given compound will always contain the same elements in the same proportions by mass.the law of multiple proportions states when two elements combine with each other to form more than one compound, then the weights of one element that combine with a fixed weight of the other are in a ratio of small whole numbers.