Answer:
It seems there's more information in you question that you haven't posted.
7 months = 7 * (365/12) = 213 days
The half-life of chromium 51 is 27.7 days.
After 7 months, chromium 51 will have undergone 7.69 half-lives.
To solve for the ending amount we'll use the formula:
Ending Amount = Beginning Amount / 2^n where 'n' = # of half-lives
We'll say the beginning amount =1
Ending Amount = 1 / 2^7.69
Ending Amount = 0.0048426082
Basicaly if you started with 1 gram of chromium 51, after 7 months you would have 0.0048426082 grams.
Source: https://www.1728.org/halflife.htm
Step-by-step explanation:
Answer:
you are correct with 360 degrees
Step-by-step explanation:
90 degree rotation clockwise : (a,b) --> (b,-a)
so... (24,-15) --> (-15,-24) is a 90 degree clockwise rotation
Answer:
<em>An </em><em>echo</em>
Step-by-step explanation:
................
Since the spinner is labelled A, B, C, D, there are four possible landing for the spinner.
Thus, the sample space is {A, B, C,D}.
Therefore, the number of <span>elements in the sample space for spinning a spinner labeled A, B, C, D</span> is 4.
