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The ratio of the surface areas of two similar solids is 49:100. What is the ratio of their corresponding side lengths?
2 answers:
Answer:
The answer is option C
Step-by-step explanation:
we know that
The ratio of the surface areas of two similar solids is equal to the scale factor squared and the ratio of their corresponding sides lengths is equal to the scale factor
so
Let
x------> surface area of the smaller solid
y--------> surface area of the larger solid
z-------> scale factor
substitute the values
therefore
The ratio of their corresponding sides lengths is equal to
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this question is incomplete, the complete question is:
1. is this model effective
2. what is the correlation coefficient for this data.
3. for a student with a bmi of 25, what is the predicted number of hours under the influence.
Step-by-step explanation:
1. first of all this model is not effective because we have r² as 0.134. this tells us that only 13.4 percent of the of the variations that exist in this data has been explained by the model
1. we get the correlation coefficient by
the regression slope coefficient has a negative sign. this is what we would use in calculating the correlation coefficient.
= -√0.134
= -0.366
therefore the correlation coefficient is -0.366
2. to get the number of hours under the influence with a bmi of 25
the equation is
49.2-1.15bmi
= 49.2-1.15(25)
= 49.2-28.75
= 20.45