First place can be any one of the 3 competitors. For each of those . . .
Second place can be either one of the 2 remaining. For each of those . . .
Third place is the 1 remaining runner.
Total number of possibilities = (3 x 2 x 1) = <em>6</em> .
Here are all the possible ways they can finish:
1). A B C
2). A C B
3). B A C
4). B C A
5). C A B
6). C B A
Using an exponential function, it is found that 4 mg of the substance would still be left after 32 days.
<h3>What is an exponential function?</h3>
A decaying exponential function is modeled by:

In which:
- A(0) is the initial value.
- r is the decay rate, as a decimal.
In this problem, considering that the initial amount if of 64 mg, and we are working with half-lifes, the equation is given by:

32 days is 32/8 = 4 half-lifes, hence the amount remaining in mg is given by:

More can be learned about exponential functions at brainly.com/question/25537936
Answer:
Mathematics lesson
Step-by-step explanation:
Algebra and 3D, D-Shapes
Answer:
B ( -1, -8)
Step-by-step explanation:
A ( -7, -6)
midpt (-4, -7)
Equation:
(x + 3, y - 1)
Solve for B:
(-4, -7)
(x + 3, y - 1)
( -1, -8)
I hope this helps. if not, feel free to leave a feed back.