GUYS PLEASE HELP M ASAP The moon orbits the sun with a velocity of 2.2 x 10^4miles per hour. What is this velocity in meters per second? Show your math and pay attention to significant figures. (Hint: You can use 1mi= 1.609 km as a conversion factor)

The answer to the question is d

Radon-222 or rn-222 has a half-life of 3.82 days. to determine the fraction of an original sample of rn-222 that remains unchanged after 7.646 days, we calculate the amount of rn-222 remaining after 7.646 days and divide it with the original amount. using 1 gram as a basis and using half-life calculation methods, we can determine that  0.249 or 0.25  grams of rn-222 will remain, and thus the fraction remaining is 0.25 or 1/4.

The answer is c. risk

The nationalists army held a higher advantage because of the ammount of men in the army. outnumbered them up to 3 over 1.