What is the half life of a radioisotope if you started with 1 gram and 0.250 grams is left after 6 days?

3 days

Explanation:

We have to use the formula;

N/No = (1/2)^ t/t1/2

Where;

N= amount of radioactive material left after a time t = 0.250g

No= original amount of radioactive substance present= 1g

t= time taken to decay to N= 6 days

t1/2= half life of the sample

N/No = (1/2)^ t/t1/2

Substituting values;

0.25/1 =( 1/2)^6/t1/2

25/100 = ( 1/2)^6/t1/2

1/4 = (1/2)6/t1/2

(1/2)^2 = (1/2)6/t1/2

Canceling out bases and equating powers

2= 6/t1/2

t1/2= 6/2

t1/2= 3 days

the child will have heterozygous dominant chromosomes as characters of his father are dominant over the characters of his mother.

the child is heterozygous

why is cellular respiration important for homeostasis?

it changes food into energy that the organism can use.

which of the following is most likely to happen if a cell is not able to divide?

the cell will not be replaced when it is damaged.

explanation: