Assume the Earth is a perfect sphere with radius 6371 km. Calculate the volume of the Earth in km3. Give your answer in the form × 10, where 1 ≤ < 10 and ∈ Z.

The expression 20l+25g-10 calculates the number of dollars that the abc lawn company. how many dollars does the company make from raking 444 gardens and mowing 333 lawns

You decide instead to take the train there. the train will take 135 minutes. convert this into hours and minutes.

If the speed of an electromagnetic wave is 100,000 cm/s and its wavelength is 100 cm, what is its frequency? a) 100,000 cycles per second (hz) b) 1 × 10-3 cycles per second (hz) c) 10,000,000 cycles per second (hz) d) 1,000 cycles per second (hz)