Which two values are equivalent to 0.6? 1. 6 금 6% 35c 60% 100

AVprozaik [17]

35.45 rounded to the nearest whole number would be 35.

5 0

3 years ago

Suppose the lifetime of a cell phone battery is normally distributed with a mean of 36 months and a standard deviation of 2 mont

solong [7]

Answer:

They should guarantee the lifetime of their batteries for 32 months.

Step-by-step explanation:

Normal Probability Distribution:

Problems of normal distributions can be solved using the z-score formula.

In a set with mean $\mu$ and standard deviation $\sigma$ , the z-score of a measure X is given by:

$Z = \frac{X - \mu}{\sigma}$

The Z-score measures how many standard deviations the measure is from the mean. After finding the Z-score, we look at the z-score table and find the p-value associated with this z-score. This p-value is the probability that the value of the measure is smaller than X, that is, the percentile of X. Subtracting 1 by the p-value, we get the probability that the value of the measure is greater than X.

Mean of 36 months and a standard deviation of 2 months.

This means that $\mu = 36, \sigma = 2$

If the company wants to replace no more than 2% of all batteries, for how many months should they guarantee the lifetime of their batteries?

The guarantee should be the 2th percentile of lengths, which is X when Z has a pvalue of 0.02. So X when Z = -2.054.

$Z = \frac{X - \mu}{\sigma}$

$-2.054 = \frac{X - 36}{2}$

$X - 36 = -2.054*2$

$X = 31.89$

Rounding to the closest month, 32.

They should guarantee the lifetime of their batteries for 32 months.

3 0

2 years ago

Im so bad at math. Help please!

Ulleksa [173]

Answer is C. Granted gas prices are fixed. if you buy 1 gallon.. price is x. if you buy 2 gallons, price is 2x. and so on. constant rate of change.

6 0

3 years ago

In total, Anna paid $619 in payroll taxes last month. That amount included $270 in federal income tax and $166 in state income t

iren2701 [21]

Answer:

$183

Step-by-step explanation:

$619 - (270 + 166) = x$

$x = 183$

4 0

3 years ago

Geometry question please help meeee

garik1379 [7]

Answers:
Scale factor is 8:5
Area ratio is 64:25
Volume ratio is 512:125

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Explanation:

Divide the second surface area (375) over the first surface area (960) to get
375/960 = 0.390625
Then take the square root of this to get
sqrt(0.390625) = 0.625
The decimal value 0.625 converts to the fraction 5/8, which turns into the scale factor 8:5

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Once you know the scale factor, you can square both sides to get the area ratio
8:5
8^2:5^2
64:25

The area ratio is 64:25

Then go back to the scale factor, and cube each part to get the volume ratio
8:5
8^3:5^3
512:125

The volume ratio is 512:125

6 0

3 years ago