(() Calculate the following:
Carbon 14 has a half-life of 5,730 years. The sample weighs 210 grams.

a. After four half-lives, how many grams of carbon-14 remains?

b. After four half-lives, how many years have elapsed?

(Please answer questions a and b.)

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hurricanes form when warm, moist air from the ocean surface quickly rises into the atmosphere and forms storm clouds and rain. when the clouds are formed, heat is released which warms the cool air in the upper regions of the atmosphere so that the cycle can continue. which two phases of the water cycle are repeated in this process?

i think tornado but not 100%