Answer:
Stay away from alcohol and drugs
Explanation:
Teenagers have to recognize if their friend needs serious help because it can lead to very bad situations, if they're not treated properly. Warning signs may be distancing themselves from others, not talking a lot, getting into situations, they wouldn't want to get in before, not being in the same mood as they would always be, and even the most obvious ones where they explain their mental condition. You have to know who to turn to, if you can't provide the help that your friend needs, you can advise them to go to a therapist, call a hotline, speak with their loved ones, but you have to know that you can't brush it off, or say that "it's a phase", " stop being dramatic ", " you're too young to have these types of problems" etc. such phrases can be discouraging towards anyone and can lead to even worse situations.
<h3>
Answer:</h3>
60 days
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Explanation:</h3>
Half-life is the amount of time it takes half of a substance to decay away.
Guess and Check
One method for solving half-life problems like this is to guess and check. To do this, we can continue to divide 475mg by 2 until we get to 30mg.
- 475 ÷ 2 = 237.5
- 237.5 ÷ 2 = 118.75
- 118.75 ÷ 2 = 59.375
- 59.375 ÷ 2 = 29.6875
As seen here, it takes approximately 4 half-lives for this sample of Ra-225 to decay to 30mg. Now, we can multiply 4 by the length of the half-life, 15 days.
Fractions
Another way to solve this is to use fractions.
- 16 is equivalent to
.
This means that it takes 4 half-lives for 475mg to decay to 30mg. Using the same method above, we can tell that 4 half-lives are 60 days.
Important Note
In this question, I rounded occasionally. So, not all of the values are exact, but they are all very close.
Answer:
YAYYYYYYYY!!!!!!!!!!!
Explanation:
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Answer:
a: ACT
Explanation:
ACT is a standardized, mission-driven and nonprofit organization, that organizes the ACT test for students.
ACT is a college entrance test for the 11th and 12th grade student, that assesses educational developments and college readiness.
The ACT English test is generally made up of series of passages with multiple choice questions with 45 minutes duration.
The ACT Mathematics test comprises of 60 questions and 40 Science questions.
The cumulative score for the ACT test ranges from 1 to 36 (maximum score).
