An expressions is shown. what is the value of the expression? 2315.5+(-3166.75)

If 10 men take 18 days to mow 60 acres of grass, how long will 15 men take to mow 80 acres?

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.

What is always true about a positive integer raised to a negative odd power?