A radioactive material has a half life of 10 years. What is the fraction of the initial isotope is left after 60 years

2 answers:

7 0

Answer:

1/64

Step-by-step explanation:

10 = ½

20 = ¼

30 = ⅛

40 = 1/16

50 = 1/32

60 = 1/64

3 0

Answer:

0.015625 left.

Step-by-step explanation:

If we start with say 100g of the material, in 10 years there is 100 * 1/2 =

50g left ( = 0.5 left).

In 20 years there is 100*(1/2)^2 = 25 g left.

In n*10 years there is 100(1/2)^2 g

So in 60 years there is 100(1/2)^6 = 1.5625 g left

This is 1.5625 %

= 0.015625 of the origin material left.

You might be interested in

hodyreva [135]

Answer:

Check it below

Step-by-step explanation:

Hello!

By definition, the intercept of the 3 bisectors, within a triangle is the Incenter. So let's get started, by tracing three bisectors.

In the triangle PQR::

Use a compass, open its legs with a little more than half of $\overline{PQ}$ . Place the needle point in the vertex of P. Mark!
Do the same, placing the needle point in Q, following $\overline{QP}$ direction. Mark
Repeat it with the other triangle's line segment, namely: