Help time based question 10 points
2 answers:
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Answer:
76.5 cm²
Step-by-step explanation:
Given the triangles are similar , then
ratio of sides = a : b , so
ratio of areas = a² : b²
Here ratio of sides = 9 : 13.5 = 2 : 3
ratio of areas = 2² : 3² = 4 : 9
let x be the area of Δ DEF and using proportion
=
( cross- multiply )
4x = 306 ( divide both sides by 4 )
x = 76.5
The area of Δ DEF = 76.5 cm²
Answer: OPTION C.
Step-by-step explanation:
Given the following formula:
You know that "S" is the smelliness of cheese, "B" is the number of bacteria in the cheese and "A" is the surface area in square centimeters of the cheese.
For example, suppose that there are in a surface area of
.
Substitute into the formula these values:
And then evaluate:
Therefore, you can conclude that the appropriate measurement unit for "S" is: