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2 years ago

When debby's 3ds is fully charged it last for 8 hours. if she only charged it 3/5 full how long did it last her?

Mathematics

2 answers:

Luba_88 [7]2 years ago

7 0

8*3/5=4.8 hours

Hope that helps

Anuta_ua [19.1K]2 years ago

4 0

It will last her 4.8 hours (8×3/5)

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RSB [31]

Answer:

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Pre-Alg

Order of Operations: BPEMDAS

Step-by-step explanation:

Step 1: Define

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2 years ago

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iren [92.7K]

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3 years ago

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2 years ago

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stiks02 [169]

Answer:

a) 0.3277

b) 0.0128

Step-by-step explanation:

We are given the following information in the question:

N(2750, 560).

Mean, μ = 2750

Standard Deviation, σ = 560

We are given that the distribution of distribution of birth weights is a bell shaped distribution that is a normal distribution.

Formula:

$z_{score} = \displaystyle\frac{x-\mu}{\sigma}$

a) P (less than 2500 grams)

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$P( x < 2500) = P( z < \displaystyle\frac{2500 - 2750}{560}) = P(z < -0.4464)$

Calculation the value from standard normal z table, we have,

$P(x < 2500) = P(z < -0.4464) = 0.3277 = 32.77\%$

b) P ((less than 1500 grams)

P(x < 1500)

$P( x < 1500) = P( z < \displaystyle\frac{1500 - 2750}{560}) = P(z < -2.2321)$

Calculation the value from standard normal z table, we have,

$P(x < 1500) = P(z < -2.2321) = 0.0128 = 1.28\%$

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2 years ago