Which is the correct description of how to find the volume of a cylinder.

1 answer:

Citrus2011 [14]3 years ago

7 0

Answer:The formula for the volume of a cylinder is V=Bh or V=πr2h . The radius of the cylinder is 8 cm and the height is 15 cm. Substitute 8 for r and 15 for h in the formula V=πr2h . Simplify.

Step-by-step explanation:

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A salesperson earns $300.50 per week plus 7% of her weekly sales. Which of the following describes the sales necessary for the s

dsp73

300.50(0.07)= 21.04 300.50+21.04= 321.54 321.54x = 900.85 x = 2.8

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4 years ago

Can anyone help please

sp2606 [1]

A square root is equivalent to any number to the 1/2 exponent so you can simplify this to x^13/2
Like this you can make 13/2 A whole number fraction which is x^6 1/2
This is the same as x^6 × x^1/2 which can simplify to x^6 (square root of x) answer is D

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3 years ago

The time for this event for boys in secondary school is known to possess a normal distribution with a mean of 460 seconds and a

AlekseyPX

Answer:

The time that the boys need to beat in order to earn a certificate of recognition from the fitness association is 511.264 seconds.

Step-by-step explanation:

We are given that the time for this event for boys in secondary school is known to possess a normal distribution with a mean of 460 seconds and a standard deviation of 40 seconds.

The fitness association wants to recognize the fastest 10% of the boys with certificates of recognition.

Let X = time for this event for boys in secondary school

SO, X ~ Normal( $\mu=460,\sigma^{2} =40^{2}$ )

The z-score probability distribution for normal distribution is given by;

Z = $\frac{X-\mu}{\sigma}$ ~ N(0,1)

where, $\mu$ = mean time = 460 seconds

$\sigma$ = standard deviation = 40 seconds

The Z-score measures how many standard deviations the measure is away from the mean. After finding the Z-score, we look at the z-score table and find the p-value (area) 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.

Now, it is given that the fitness association wants to recognize the fastest 10% of the boys with certificates of recognition, which means;

P(X > x) = 0.10 {where x is the required time which boy need to beat}

P( $\frac{X-\mu}{\sigma}$ > $\frac{x-460}{40}$ ) = 0.10