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lukranit [14]
2 years ago
14

Solve the equation using the Zero-Product Property (X-9)(x+7)=0

Mathematics
1 answer:
aleksandr82 [10.1K]2 years ago
4 0
(x-9)(x+7)=0
x-9=0 or x+7=0
x=9 or x=-7

:)
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The radius of a sphere is 6 cm what is the volume
spayn [35]

Answer:

904.78

Step-by-step explanation:

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5 0
3 years ago
A soft drink manufacturer wishes to know how many soft drinks adults drink each week. They want to construct a 85% confidence in
andreev551 [17]

Answer: 547

Step-by-step explanation: The margin of error formulae is given below as

Margin of error = critical value ×(σ/√n)

Where σ = standard deviation and n is the sample size.

From our question, margin of error = 0.08

Variance is 1.691,

hence σ = √variance = √1.691

= 1.3.

We will be using a z test for our critical value this is because a soft drink manufacturer will always produce drinks more than 30 in numbers.

The critical value for a 85% confidence interval is 1.44.

Hence critical value is 1.44.

By substituting the parameters, we have that

0.08 = 1.44 × 1.3/ √n

0.08 = 1.873/ √n

By cross multiplying

0.08 × √n = 1.873

√n = 1.873/ 0.08

√n = 23.41

n = (23.41)²

n = 547.

7 0
3 years ago
Can anyone help me pls. Show your work.
nekit [7.7K]

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tep-by-step explanation:

4 0
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Please help <br> Thank you
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