The half-life of palladium-100 is 4 days. after 16 days a sample of palladium-100 has been reduced to a mass of 3 mg.

what was the initial mass (in mg) of the sample?

what is the mass 8 weeks after the start?

1. 48 mg.

2. 12 mg.

Step-by-step explanation:

We have been given that the half-life of Palladium-100 is 4 days. After 16 days a sample of Palladium-100 has been reduced to a mass of 3 mg.

Half-life formula: , where,

A = Final amount,

a = Initial amount,

t = Time,

h = Half-life.

Substitute the given values:

Therefore, the initial mass of the sample was 48 mg.

To find the mass of sample after 8 weeks, we will substitute in half life formula.

Therefore, the mass of sample after 8 weeks would be 12 mg.

exa:

)

3+11

14

step-by-step explanation:

from this example, we can see that subtracting with integers is the same as adding the opposite. we can solve using a number line or by using the saying "keep, change, change" to us solve. it is important to remember that we can subtract a negative and end up with a larger number than we started with.

40 x 50 = 2000

step-by-step explanation: