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pav-90 [236]
3 years ago
5

Need help with these math questions

Mathematics
1 answer:
PolarNik [594]3 years ago
5 0

Answer:

31200 m

Step-by-step explanation:

120 times 60 equals 7200  and 200 times 120 equals 24000 and add the two up you get 31200

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The price of a pair of pants is $29.95 and the sales tax is 5%.
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$30. The tax is 5 cents. 
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3 years ago
70 times 10 by the power of 2
Svetradugi [14.3K]

Answer:

I'm not sure which you mean, so I'll give the answer to both:

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8 0
3 years ago
Read 2 more answers
Researchers at a pharmaceutical company have found that the effective time duration of a safe dosage of pain relief drug is norm
FrozenT [24]

Answer:

a) P(1

b) P(X

Step-by-step explanation:

1) 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".  

2) Part a

Let X the random variable that represent the duration of a safe dosage of pain relief drug, and for this case we know the distribution for X is given by:

X \sim N(1.5,0.8)  

Where \mu=1.5 and \sigma=0.8

We are interested on this probability

P(1

And the best way to solve this problem is using the normal standard distribution and the z score given by:

z=\frac{x-\mu}{\sigma}

If we apply this formula to our probability we got this:

P(1

And we can find this probability on this way:

P(-0.625

And in order to find these probabilities we can find tables for the normal standard distribution, excel or a calculator.  

P(-0.625

3) Part b

We are interested on this probability

P(X

And the best way to solve this problem is using the normal standard distribution and the z score given by:

z=\frac{x-\mu}{\sigma}

If we apply this formula to our probability we got this:

P(X

And we can find this probability on this way:

P(z

6 0
3 years ago
2yx3x+46 can some help me please
const2013 [10]
2y*3x+46
3x+46=2y
(3x+46)/2=y
3/2x+23=y
y=3/2x+23
4 0
3 years ago
Write the equation of the parabola in vertex form.
Llana [10]

Answer:

Step-by-step explanation:

poin

5 0
3 years ago
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