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3 years ago

Please someone help me ITS URGENT I WILL BRAINLIST UUUU AND MARK U 5 star!! ANYONE WHO IS GOOD AT MATHS?..

Mathematics

2 answers:

OLEGan [10]3 years ago

8 0

Answer:

diameter=30cm

radius=30/2=15

volume of cylinder = pi×r²×h

volume of cylinder=3.14×15²×40cm

volume of cylinder=28,260cm³

adell [148]3 years ago

6 0

Answer:

28260 cubic cm

Step-by-step explanation:

Given,

Diameter of the cylinder = 30cm

So, radius of the cylinder = 30cm ÷2 = 15 cm

Height of the cylinder = 40 cm

There, volume of the cylinder,

$= \pi {r}^{2} h$

$= 3.14 \times 15cm \times 15cm \times 40cm$

$= {28260cm}^{3}$

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Hector purchased a 20 ounce bottle of mustard for $2.80. What is the cost of the mustard per ounce?

joja [24]

Answer:

0.14 $

Step-by-step explanation:

Price of 20 ounce bottle of mustard for $2.80.

Price of 1 ounce bottle of mustard for 2.80÷20 $

= 0.14 $

6 0

2 years ago

Suppose you want to eat lunch at a popular restaurant. The restaurant does not take reservations, so there is usually a waiting

grin007 [14]

Answer:

a) $z_1 =\frac{20-19}{4} =0.25$

$z_2 =\frac{15-19}{4} =-1$

And we can use the complement rule and we got:

$P(z>0.25)=1-P(z$

$P(z>-1)=1-P(z$

And replacing we got:

$P(X >20| X>15)= \frac{0.401}{0.841}= 0.477$

b) $z_1 =\frac{20-19}{4} =0.25$

$z_2 =\frac{18-19}{4} =-0.25$

And we can use the complement rule and we got:

$P(z>0.25)=1-P(z$

$P(z>-0.25)=1-P(z$

And replacing we got:

$P(X >20| X>18)= \frac{0.401}{0.599}= 0.669$

Step-by-step explanation:

Previous concepts

Normal distribution, is a "probability distribution that is symmetric about the mean, showing that data near the mean are more frequent in occurrence than data far from the mean".

The Z-score is "a numerical measurement used in statistics of a value's relationship to the mean (average) of a group of values, measured in terms of standard deviations from the mean".

Solution to the problem

Let X the random variable that represent the length of time waiting to be seated of a population, and for this case we know the distribution for X is given by:

$X \sim N(19,4.0)$