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3 years ago

.002centimeter=_____mm Help plz

Mathematics

1 answer:

kompoz [17]3 years ago

8 0

Answer: 0.02 Millimeters

Step-by-step explanation: your welcome

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David rode 2.5 kilometers on his bike. Jessie rode 2,050 meters on her bike. Who rode farther and by how many meters?

weqwewe [10]

2.5 kilometres is 2500 meters as 1km is 1000m

2500-2050 = 450m

as david is the one that rode 2.5 kilometres he rode further by 450 meters

8 0

3 years ago

A publisher reports that 45% of their readers own a laptop. A marketing executive wants to test the claim that the percentage is

nexus9112 [7]

Answer:

$z=\frac{0.40 -0.45}{\sqrt{\frac{0.45(1-0.45)}{370}}}=-1.933$

$p_v =2*P(z$

Step-by-step explanation:

Information given

n=370 represent the sample selected

$\hat p=0.4$ estimated proportion of readers owned a laptop

$p_o=0.45$ is the value that we want to test

z would represent the statistic

$p_v$ represent the p value

Creating the hypothesis

We need to conduct a hypothesis in order to test if the true proportion of readers owned a laptop is different from 0.45, the system of hypothesis are:

Null hypothesis: $p=0.45$

Alternative hypothesis: $p \neq 0.45$

The statistic is:

$z=\frac{\hat p -p_o}{\sqrt{\frac{p_o (1-p_o)}{n}}}$ (1)

Replacing we got:

$z=\frac{0.40 -0.45}{\sqrt{\frac{0.45(1-0.45)}{370}}}=-1.933$

Calculating the p value

We have a bilateral test so then the p value would be:

$p_v =2*P(z$

8 0

3 years ago

Help me answer these questions

Reil [10]

Answer:

See below.

Step-by-step explanation:

1. x = e^(x/y) Taking logs:

log x = x/y

x = y log x

Differentiating:

1 = dy/dx log x + y * 1/x

dy/dx log x = (1 - y/x)

dy/dx = (1 - y/x) / log x

dy/dx = ((x - y)/ x) / log x

dy/dx = (x - y) / x log x)

2. y^x = e ^(y - x)

Taking logs:

x log y = y - x --------------(A)

y = x + x logy --------------(B)

dy/dx = 1 + x * 1/y * dy/dx + 1*logy

dy/dx - dy/dx * x/y = 1 + log y

dy/dx ( (x - y) y)) = 1 + log y

dy/dx = y(1 + log y) / (y - x)

Using (A) and (B) :-

dy/dx = x(1 + logy)(1 + logy) / x logy The x's cancel, so:

dy/dx = (1 + logy)^2 / log y

Sorry I have to go right now..

The rest of the answers are on the re-post of these questions

8 0

3 years ago

If in one year a city recorded a total of 97 rainy, how many of the days did it not rain?

Shalnov [3]

1 year = 365 days

365 -97 = 268

it did not rain 268 days

3 0

4 years ago

Below is the five Number summary for a 136 hikers who recently completed the John muir trail JMT the variable is the amount of t

Helga [31]

Answer:

$IQR = Q_3 -Q_1 = 28-18 = 10$

Now we can find the limits in order to determine outliers like this:

$Left = Q_1 -1.5 IQR = 18 -1.5*10=3$

$Right = Q_1 +1.5 IQR = 18 +1.5*10=33$

So for this case the left boundary would be 3, if a value is lower than 3 we consider this observation as an outlier

b. 3

Step-by-step explanation:

For this case we have the following summary:

$Minimum = 9$ represent the minimum value

$Q_1 = 18$ represent the first quartile

$Median =Q_2= 21$ represent the median

$Q_3 = 28$ represent the third quartil

$Maximum=56$ represent the maximum

If we use the 1.5 IQR we need to find first the interquartile range defined as:

$IQR = Q_3 -Q_1 = 28-18 = 10$

Now we can find the limits in order to determine outliers like this:

$Left = Q_1 -1.5 IQR = 18 -1.5*10=3$

$Right = Q_1 +1.5 IQR = 18 +1.5*10=33$

So for this case the left boundary would be 3, if a value is lower than 3 we consider this observation as an outlier

b. 3

7 0

3 years ago