There are 5 red marbles, 15 blue marbles, and 5 green marbles in a bag. you reach in and randomly draw a marble, replace it, and draw another marble. what is the probability that the first will be red and the second will be blue?
80%
20%
12%
8%

If eh = hg and hg=16, find the diameter of k

The magnitude, m, of an earthquake is defined to be m=log l/s, where i is the intensity of the earthquake (measured by the amplitude of the seismograph wave) and s is the intensity of a “standard” earthquake, which is barely detectable. what is the magnitude of an earthquake that is 1,000 times more intense than a standard earthquake? use a calculator. round your answer to the nearest tenth.

Seymour is twice as old as cassandra. if 16 is added to cassandra’s age and 16 is subtracted from seymour’s age, their ages become equal. what are their present ages? show !