Find the missing value for the radioactive isotope. (round your answer to two decimal places.)

isotope: 14c

half-life (in years): 5715

amount after 1000 years: 1 g

find the initial quantity

explain answers. i don't understand how to solve this.

1.1289 grams ( approx )

Step-by-step explanation:

Since, the final quantity of an element which has half life of n periods,

Where,

P = initial quantity,

t = total number of periods,

Here, A = 1 gram, t = 1000 years, n = 5715 years,

By substituting the values,

( using calculator )

Hence, the initial quantity would be 1.1289 grams ( approx )

18.8 cubic inches.

step-by-step explanation:

volume of a cone = πr²h

r = 1.5 inches

h = 8 inches

pi = 3.14

volume of our cone = × 3.14 × 1.5² × 8 = 18.84 square inches

or equals to 18.8 square inches rounded up to nearest tenth.

lol we need to see what the question is asking about

step-by-step explanation: