<u>Answer:</u>
29 years
<u>Step-by-step explanation:</u>
- Given the function
, where x stands for the number of years since the material was put into the vault, we can plug 140 into x to find the amount leftover. - Another way of doing this is to change the function to
which are equivalent functions, and then plug 140 into x. This function is helpful if you also needed to find the rate. - I'll use the 1st function because the question doesn't ask for the rate

From here I'll just use a calculator & get 28.7, or 29 years.
How am I suppose to help you if I can’t see the words. It’s too blurry.
Answer:
Approximately 439.6 square millimeters.
Step-by-step explanation:
The formula for the surface area of a cone is the following:

Where, <em>r </em>is the radius and <em>l</em> is the slant height.
The radius is 7 and the slant height is 13. We also use 3.14 for π Thus:

Answer:
2730 possible ways
Step-by-step explanation:
Given


Required
Number of possible selections
Since there is no restriction, the number of selection is calculated as:
The day nursing supervisor position can be occupied by any of the 15 applicants
The night nursing supervisor position can be occupied by any of the remaining 14
The nursing coordinator position can be occupied by any of the 13
So, the number of ways is then calculated as:


<em>Hence, there are 2730 possible ways</em>