19jcormier
10.03.2020 •
Mathematics
Rounding to the nearest
tenth, what is the mean of
100, 75, 40, 90, 80, 100,
92, 88, 80, 84, 81?
Solved
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Ответ:
82.7
Step-by-step explanation:
add 100+75+40+90+80+100+92+88+80+84+81=910
divide 910 by 11
Ответ:
===========================================================
Explanation:
As shown in the diagram below, I've drawn a blue horizontal line to split the figure into two rectangles (smaller one up top, larger down below).
The smaller rectangle up top is 25 ft by 8 ft, giving an area of 25*8 = 200 sq ft.
The larger rectangle down below is 35 ft by 25 ft so we have an area of 35*25 = 875 sq ft.
The total area is 200+875 = 1075 square feet
Notes:
We can write "square feet" as "sq ft" or as "ft^2" without quotes.The portion "5 ft", in the upper left corner, is never used.