Hello. I need some help with Algebra. Please refer to the image. I kinda am new to this and would really appreciate an answer (:
1 answer:
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240 days is 4 times the half-life, which means that a sample of 1000 mg will decay to
after 240 days.
Answer:
D. Up
Step-by-step explanation:
When a parabola has the form , It is vertical (opens up or down).
Because the variable "x" is squared.
If "a" is positive, then the parabola opens up, but if it is negative, then the parabola opens down.
In this case you have the quadratic function:
Which can be rewritten as:
Therefore, it is vertical, because it has the form:
You can observe that the value of "a" is:
Then, since "a" is positive, the parabola opens up.