How much of a 250mg sample of N-16 has decayed after 21.39
seconds?

the correct answer is answer a. a mixture

no other options make sense

hope this

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  - sprinkles

elements

explanation:

yes the other ones are right just show me a pic of ur face cuz u look hot

a pan containing water is placed in a positio n where it is exposed to a 10 mile per hour wind. the pan contains a uniform depth of 1.27 cm of water, is quite wide, and has a length of 2.44 m in the wind direction. the water in the pan is at a constant temperature of 15.5 °c.