Part A: The sun produces 3.9 ⋅ 103^3 ergs of radiant energy per second. How many ergs of radiant energy does the sun produce in 2.45 ⋅ 10^5 seconds? Part B: Which is the more reasonable measurement of the diameter of a blood cell:
7.4 ⋅ 10^−3 mm or 7.4 ⋅ 10^3 mm? Justify your answer.

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 expression is equivalent to 42x-56y

Find the area of the regular hexagon if a side is 20 cm.