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xxMikexx [17]
3 years ago
12

A study of 420,090 cell phone users found that 135 of them developed cancer of the brain or nervous system. Prior to the study o

f cell phone use, the right of such cancer was found to be 0.0203% for those not using cell phones. A. Use The sample data to construct a 90% confidence interval estimate of the percentage of cell phone users who develop cancer of the brain or nervous system.
Mathematics
1 answer:
Pepsi [2]3 years ago
7 0
I have no clue I would help but have know clue
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Why do you need to find common denominators simplify your equation
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Three points that are not collinear determine three lines. How many lines are determined by nine points, no three of which are c
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Answer:

Use the method for solving Bernoulli equations to solve the following differential equation.

StartFraction dy Over dx EndFraction plus StartFraction y Over x minus 9 EndFraction equals 5 (x minus 9 )y Superscript one half

Step-by-step explanation:

Use the method for solving Bernoulli equations to solve the following differential equation.

StartFraction dy Over dx EndFraction plus StartFraction y Over x minus 9 EndFraction equals 5 (x minus 9 )y Superscript one half

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Suppose the solutions of a homogeneous system of four linear equations in five unknowns are all multiples of one nonzero solutio
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Consider a homogeneous machine of four linear equations in five unknowns are all multiples of 1 non-0 solution. Objective is to give an explanation for the gadget have an answer for each viable preference of constants on the proper facets of the equations.

Yes, it's miles true.

Consider the machine as Ax = 0. in which A is 4x5 matrix.

From given dim Nul A=1. Since, the rank theorem states that

The dimensions of the column space and the row space of a mxn matrix A are equal. This not unusual size, the rank of matrix A, additionally equals the number of pivot positions in A and satisfies the equation

rank A+ dim NulA = n

dim NulA =n- rank A

Rank A = 5 - dim Nul A

Rank A = 4

Thus, the measurement of dim Col A = rank A = five

And since Col A is a subspace of R^4, Col A = R^4.

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