10. olivia wrote the following indirect proof:
prove: 17 is a factor of 323.
step 1: assume that 17 is not a factor of 323.
step 2: 323 divided by 17 is 19.
step 3: a factor is an integer by which another integer is divisible.
step 4: therefore, 17 cannot be a factor of 323.
which step in olivia's proof is incorrect?

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.