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3 years ago

I need help, confused.

Mathematics

1 answer:

Lemur [1.5K]3 years ago

8 0

Answer:

x=90

Step-by-step explanation:

it is a square so: 360/4=90

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Over the past several years, the proportion of one-person households has been increasing. The Census Bureau would like to test t

Ganezh [65]

Answer: z =2.39

Step-by-step explanation:

Given :

$H_0: p \leq0.23\\\\ H_a: p > 0.23$

A random sample of 136 households found that 43 consisted of one person.

i.e. Sample size : n= 136

Sample proportion : $\hat{p}=\dfrac{43}{136}=0.316176470588\approx0.3162$

Test statistic for proportion :-

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

$\Rightarrow z=\dfrac{0.3162-0.23}{\sqrt{\dfrac{0.23(1-0.23)}{136}}}\\\\\Rightarrow\ z=\dfrac{0.0862}{\sqrt{0.00130220588235}}\\\\\Rightarrow\ z=\dfrac{0.0862}{0.0360860898734}\\\\=2.38873206552\approx2.39$

Hence, the value of the test statistic: z =2.39

5 0

3 years ago

The surface of a pond is being covered by oil leaking from a pipeline. The amount of surface area covered by the oil is doubling

fomenos

Answer:

Count

Step-by-step explanation:

Suppose that each day double 2, second day , will double 4, and for third day it's 16, etc.

For like those questions, just count.

Those questions are very simple, but other questions not like those, is not too simple.

7 0

2 years ago

PLEASE HELP ASAP :D<br> what is <br> sin <br> cos<br> tan

Helga [31]

Answer:

sin=180/181

cos=19/181

tan=19/180

8 0

3 years ago

Evaluate:

sergey [27]

Answer: 4.4

Step-by-step explanation:

First: Simplify the -7/10 to a decimal. That will be -0.7.

Second: Add -0.7 with 0.15. That gives you -0.55

Third: Divide -0.55 with -0.125 and that gives you 4.4

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3 years ago

What is the missing numerator in 1 1/8=?/16

Sveta_85 [38]

Answer:

Step-by-step explanation:

12/18 is just. 11/6*2

5 0

2 years ago