Answer:
25 m², 16 m², and 9 m²
Step-by-step explanation:
5 × 5 = 25 m²
4 × 4 = 16 m²
3 × 3 = 9 m²
A) 16, 17, 18, 19
B) 66, 77, 88, 99
C) 61, 71, 81, 91
D) 60, 70, 80, 90
The number who drink coffee is 3/4 of 8000, so ...
... (3/4)×8000 = 6000.
Of those, 1/5 add cream, so the number of coffee drinkers who add cream to their coffee is ...
... (1/5)×6000 = 1200.
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Alternate solutions
We have computed ...
... (1/5)×((3/4)×8000) = 1200
Since multiplication is associative, you can multiply the fractions first, if you wish:
... ((1/5)×(3/4))×8000 = (3/20)×8000
... = 24000/20 = 1200
or
... = 3×(8000/20) = 3×400 = 1200
