Answer:
a
Step-by-step explanation:
We want to know when we brought it back in to the room. at that time
the temperature difference is 80 - 42 = 38 so we have to solve
<span>
38=9<span>e<span>^−.3344t</span></span></span> for t
this time we get
<span><span>38 / 9</span>=<span>e^<span>−.3344t</span></span></span>
<span>t=<span><span>ln(<span>38 / 9</span>)</span><span> / −.3344</span></span></span>
<span>t=−4.3</span>
so 4.3 minutes before 2:10
Answer:
-2 and 2/3
Step-by-step explanation:
(2/3) / (-1/4) is equivalent to (2/3) x (-4/1)
This equals -8/3, of which simplifies down to -2 and 2/3
There are two solutions for this problem. It depends if order matters or not. Since it is not mentioned in the problem, it is safe to assume that order does not matter and that choosing can be done at random. Then, this is a combination problem:
nCr = n!/r!(n-r)!
where n=13 because there are <span>13 qualified candidates</span>, and r=8 because you choose 8 chiefs at a time
nCr = 13!/8!(13-8)! = 1,287 ways
The perimeter of each frame would be 24 inches.
24 x 5 = 120
So the total length around all of the frames would be 120 inches.