20-05-2021
Biology

contestada

A radioactive material has a half-life of 30 days. You begin with 4 grams of radioactive material.

a. How much of the original is left unchanged after 90 days?

b. After 120 days?

Give explanation. Don't go.ogle.

Respuesta :

shadiptoshouhardo002 shadiptoshouhardo002

20-05-2021

Answer:

a. 0.5 grams b. 0.25

Explanation:

Just use the half-life formula(I linked it below)

a. 4(1/2)^90/30=1/2

b. 4(1/2)^120/30=1/4

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