Answer:
6.56 g
Step-by-step explanation:
We can write the mass of radioactive isotope left after a time t by using the equation

where
is the initial amount of radioactive isotope
is the half-life
is the time
In this problem, we want to know the amount of radioactive isotope left after 5 half-lives, so after

Substituting into the equation, we have

Answer:
5+7*x
Step by step explanation.....
F and E are congruent with the figure above
<span>How many times does the quadratic function below intersect the x-axis?
</span>A. 2
What the question is really asking for is the x-intercept (the point at which the graph crosses the x-axis), which, according to the graph, is 6.