Answer:
£151.2
Step-by-step explanation:
12% of £1260
= 0.12 (1260)
= 151.2
About 92 days are taken for 90 % of the material to <em>decay</em>.
The mass of radioisotopes (), measured in milligrams, decreases exponentially in time (), measured in days. The model that represents such decrease is described below:
(1)
Where:
- - Initial mass, in milligrams.
- - Current mass, in milligrams.
- - Time constant, in days.
In addition, the time constant is defined in terms of half-life (), in days:
(2)
If we know that , and , then the time required for decaying is:
About 92 days are taken for 90 % of the material to <em>decay</em>.
We kindly invite to check this question on half-life: brainly.com/question/24710827
So it is rational<span>. Every </span>whole number<span> n n can be written as a fraction of </span>integers: n=n1 n = n 1 . We aren't required to write it that way; we just need to know that it ispossible<span> to express every </span>whole number<span> as a fraction of </span>integers, and hence it isrational<span>.</span>
The total number of marbles is 15. The probability of picking a blue marble is 6/15. After putting the marble back, the probability of picking another blue marble is probably 1/9.
Answer: the probability of picking two blue marbles in a row is 1/9.