Answer:
If y(t) is the mass (in mg) remaining after t years, then y(t) = y(0) (0.5)^{t/T} = 400 (0.5)^{t /4}, where T is the half-life period and y(0) is the amount at t = 0 years (initial).
Then at t = 20:
y(20) = 400 (0.5)^{20 /4} = \text{12.5 mg}
Step-by-step explanation:
Answer:
Step-by-step explanation:
This question is asking us to rewrite the original expression it in the form 
First we have
By the law of exponents we know that when we are multiplying expressions that have the same base, we need to add up the exponents.
Thus, this would mean that, in order to multiply this expression, we need to sum up the exponents so we have:
Thus, this expression can be rewritten as:
Answer:
C. (–4, 0), (–2, 0), (1, 0), and (3, 0).
Step-by-step explanation:
The points where the graph intersects the x axis have y coordinates of zero and the given x coordinates.
(–4, 0), (–2, 0), (1, 0), and (3, 0) is the answer.
Answer:
B
Step-by-step explanation:
y+10>12
-10 -10
y>2 aka B
y is GREATER THAN OR EQUAL TO 2
