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1 year ago

50 points to whoever answers!!

Mathematics

1 answer:

Phantasy [73]1 year ago

5 0

Answer:

create a line between (0,0) and (1,3)
the unit rate is 3/2 or 1.5

Step-by-step explanation:

pls mark

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You can write the equation of the line if you have two points on the line.

Artemon [7]

Pretty sure it is true. sorry if wrong.

5 0

3 years ago

Read 2 more answers

How do you convert 1/40 of an hour into minutes?

alexandr1967 [171]

An hour has 60 minutes so 1/40 of an hour is:
(1/40)(60) = 60/40 = 6/4 = 3/2 = 1.5
so 1/40 of an hour is a minute and a half

4 0

2 years ago

Read 2 more answers

I’m confused on this one

Dmitriy789 [7]

It just happens that tan 14 degrees is about 0.25 or 1/4. According to my calculator, it's actaull 0.249.

Now try finding tan 76 degrees to approx. the same level of accuracy.

tan 76 deg = (via calculator) 4.0108. this could be re-written as 4 or 4.1.

7 0

3 years ago

What is the volume of a cuboid when it is 4m by 4cm by 7cm

9966 [12]

Answer: The volume of the cuboid is: " 11 ,200 cm³ " .

_________________________________________________

Step-by-step explanation:

____________________________________________________

The formula for the volume of a "cuboid" ;

which is given in: "cubic units" ; or, "units³ " ; is:

____________________________________________________

→ Volume, "V" = length (L) * width (w) * (height) ;

____________________________________________________

→ The 3 (three given values are "4m" , "4 cm" and "7cm" .

We need the units of measurement to be equal; so we need to convert the " 4m " to "cm" :

Note that: " 1 m = 100 cm " ; {exact conversion} ;

So: 4m ( 100 cm / 1 m) = (4 * 100) cm = 400 cm.

_____________________________________________________

Now, we can plug these values and solve for the volume; in units of "cm³ " ;

_____________________________________________________

V = 400 cm * 4 cm * 7 cm ;

= 400 * 4 * 7 * cm * cm * cm ;

= 400 * 4 * 7 cm³ ;

= 1600 * 7 cm³ ;

= 11, 200 cm³

_____________________________________________________

The answer is: " 11 ,200 cm³ " .

_____________________________________________________

8 0

3 years ago

g In the past decades there have been intensive antismoking campaigns sponsored by both federal and private agencies.The value o

nevsk [136]

Answer:

Option C is correct.

The value of the z statistic for testing equality of the proportion of smokers in 1995 and 2010 = 2.05

Step-by-step explanation:

Complete Question

In the past decades there have been intensive antismoking campaigns sponsored by both federal and private agencies. In one study of national smoking trends, two random samples of U.S. adults were selected in different years: The first sample, taken in 1995, involved 4276 adults, of which 1642 were smokers. The second sample, taken in 2010, involved 3908 adults, of which 1415 were smokers. The samples are to be compared to determine whether the proportion of U.S. adults that smoke declined during the 15-year period between the samples.

Let p₁ be the proportion of all U.S. adults that smoked in 1995. Let p₂ denote the proportion of all U.S. adults that smoked in 2010.

The value of the z statistic for testing equality of the proportion of smokers in 1995 and 2010 is

A. z = 1.39.

B. z = 1.66.

C. z = 2.05.

D. z = 4.23.

Solution

The test statistic for two samples test is given as

z = (p₁ - p₂)/σ

σ = √{[p₁(1-p₁)/n₁] + [p₂(1-p₂)/n₂]}

p₁ = Proportion of smokers in 1995 = (1642/4276) = 0.384

n₁ = 4276

p₂ = Proportion of smokers in 2010 = (1415/3908) = 0.362

n₂ = 3908

σ = √{[0.384(1-0.384)/4276] + [0.362(1-0.362)/3908]}

σ = √[(0.384×0.616/4276) + (0.362×0.638/3908)] = √(0.0000553189 + 0.0000590983) = √0.0001144172 = 0.0106965976 = 0.010697

z = (p₁ - p₂)/σ

z = (0.384 - 0.362)/0.010697

z = 2.05

Hope this Helps!!!

3 0

3 years ago