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Tcecarenko [31]
1 year ago
15

The surface area of a sphere is directly proportional to the square of its radius. Find: a)the change in surface area of radius

decreases 19% b) The change in radius of the surface area is trebled
Mathematics
1 answer:
cluponka [151]1 year ago
3 0

Answer:

a: 34%

b: couldn't find the answer

Step-by-step explanation:

first we put the radius as r

we know surface area is 4pirsquared

so then we minus percent which is 119 so it is 81/100

square that fraction which will result 6561/10000

now we put in and equation of 4pirsquared -4pirsquared multiply 6561/10000 divide this all by 4pirsquared to get 3439/10000 or 0.3439 change it to %

34.39%

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Write square root 99 add square root 44 in the form A square root B where A and B are intergers
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For a set of data: x = (0,1,2,3,4,5,6) and y=(36, 28, 25, 24, 23, 21, 19), is it wise to use a linear regression to extrapolate
melisa1 [442]

Answer:

The problem with this solution is that a regression model is not recommended to extrapolate because we do not know if the linear relation that we calculated for a specific range of x values still holds outside this range.

Step-by-step explanation:

We have a linear regression model, with a range of the independent variable "x" that goes from 0 to 6.

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4 0
1 year ago
Suppose log subscript a x equals 3, log subscript a y equals 7, and log subscript a z equals short dash 2. Find the value of the
enyata [817]

Answer:

<h2>24</h2>

Step-by-step explanation:

Given the following logarithmic expressions log_ax = 3, log_ay = 7, log_az = -2, we are to find the value of log_a(\frac{x^3y}{z^4} )

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6 0
2 years ago
Two parallel lines are crossed by a transversal. What is the value of x ?
olga nikolaevna [1]

Answer:

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Therefore, angle x =  angle 115.

4 0
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