The best estimate of this amount of water is [tex]3*10^{7}[/tex].
Given:
At an elevation of 1221. 4 feet, lake mead will hold 28,945,000 acre-feet of water.
So, the amount of water that is in the lake will be 28,945,000 acre-feet which is estimated to be 30000000 acre-feet of water.
Because the nearest estimate to 28945000 is 30000000.
= 30000000
= 300000*[tex]10^{2}[/tex]
= 30000*[tex]10^{3}[/tex]
= 3000*[tex]10^{4}[/tex]
= 3*[tex]10^{3} *10^{4}[/tex]
= 3*[tex]10^{7}[/tex]
Therefore The best estimate of this amount of water is [tex]3*10^{7}[/tex].
Learn more about the elevation here:
https://brainly.com/question/481548
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