F is the answer
Tri- means 3 raw then the constant is the 3
Answer:
70-79
Step-by-step explanation:
If you look at the histogram, the graph that has 70-79 is the lowest.
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8171 9 inches and different radius
Answer:

The above expression shows that ratios of the areas of the circles are equal to the square of the ratio of their radii.
Step-by-step explanation:
Radius of first circle
= 9 inches
Area of first circle = 
Area of first circle = 9 × 9 × π = 81 π
Now, since the radius is multiplied by 2/3 for from a new circle.
∴ Radius of the second circle = 
Area of second circle = 
Area of second circle = 6 × 6 × π = 36 π
Now,


∵
= 9 inches and
= 6 inches
The above expression shows that ratios of the areas of the circles are equal to the square of the ratio of their radii. i.e., 
Answer:
8.47 is less than 8.63
Step-by-step explanation:
Although they both contain the number 8, if you look at the decimals, 63 is more than 47. Hence, 8.47 is less than 8.63.