can you help with this

Question

in December, the average rainfall in all of the deserts is 0. 89 mm. use the figures from the table to write a comparison of average desert rainfall in august and December.   The  table numbers are average in august.  Reno- 0.19mm, Sahara-0.17mm, Mojave-0.1mm, Tempe-0.24mm

Answer 1

Hi Geraldine,

 

The goal is to use the figures in the table to be able to write a comparison.

 

First, use the figures in the table.

We already have the average rainfall for the deserts in December. Now, we can take numbers from the table and get August's average.

 

NOTE: Two of the places in the table are not deserts, but are cities within deserts. Do they want you to include them? I don't have enough information to advise you. So, you will either be getting an average for the 2 deserts or for the 4 desert regions. Hmmmm. Maybe I'm too literal.

 

To get an average, add the numbers. (Since they are all mm's (millimeters), you will not need to convert any of them to different measurements; such as cm's to mm's or ounces to pounds. This is good. You are ready to add.)

 

After you add, take the sum and divide it by how many numbers you added; in this case either 2 or 4.

 

Here's an example with 2 figures:

 

Find the average of 0.09mm and 0.11mm.

 

Line up the decimal points and add.

0.09mm
0.11mm

0.20mm (simplify to 0.2mm)

 

Divide this sum by the number of figures we added (count the addends). We added 2 figures.

 

0.02 ÷ 2     

 

     0.1

2 | 0.2

 

So, the average of 0.09mm and 0.11mm is 0.1mm

 

If this looks funny, remember 0.1 can also be written 0.10.

 

Here's an example with 4 figures:

 

Find the average of 0.07mm, 0.2mm, 0.23mm, and 0.04mm.

Line up the decimal points and add.
0.07mm

0.2  mm  (this can also be written 0.20mm
0.23mm
0.04mm

0.54mm

Divide this sum by the number of figures we added (count the addends). We added 4 figures.

 

0.54mm ÷ 4

 

        .135
4 | 0.54

         4 

         14

         12

           20

           20

             0

So, the average of 0.07mm, 0.2mm, 0.23mm, and 0.04mm is 0.135mm.

 

Using the above examples, find the average rainfall in the deserts in August.

 

 

Finally, write a comparison:

Take December's average and August's average and write a comparison statement. It would look something like this example:

 

In the mountains, November's average snowfall of 2.47ft is less than January's average snowfall of 5.69ft.

 

I hope this is helpful. :)