Find the percent of the tip to the nearest tenth of a percent. cost of meal: $18.50 tip: $2.80 percent of tip equals?

Reduce fractions expressing probability to lowest terms. in 3,000 repetitions of an experiment, a random event occurred in 500 cases. the expected probability of this event is?

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

The difference of three and the reciprocal of a number is equal to the quotient of 20 and the number. find the number.