Answer: 
Step-by-step explanation:
Given
The highest temperature recorded is 
The lowest temperature recorded is 
The amount of change between the high and the low temperatures is

The answer to that one is C
Answer:
1/10x * 1/10x
Step-by-step explanation:
Writing a term with negative exponents is the same as putting it in a fraction.
10x^-1 = 1/10x
so the expression would be
1/10x * 1/10x
Remember that the general decay equation is:

where

is the amount after a time


is the initial amount

is the the decay percent in decimal form
The first ting we are going to do is find

by dividing our <span>decay rate of 25% by 100%: </span>

.
We also know from our problem that

. Lets replace

and

in our formula:


We know now that our decay rate is 0.75, and since 0.75<1, we can conclude that
this situation represents exponential decay.
Now, to find the initial amount, we are going to solve our equation for

:


Notice that

will depend on the number of ours

. <span />
Answer:
Open dot on 4 with arrow going to the right.
Step-by-step explanation:
4 is open because it is not part of the set.