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3 years ago

I need it ASAP! Sharon wanted to buy 3.1 m of red fabric and 6.9 m of blue fabric.

Mathematics

2 answers:

BARSIC [14]3 years ago

8 0

I'd say A. I'm not 100% sure though :/ Sorry

Kryger [21]3 years ago

4 0

The answer is A I've did that before

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The claim is that the proportion of adults who smoked a cigarette in the past week is less than 0.30, and the sample statistics

IrinaK [193]

Answer: 0.84

Step-by-step explanation:

let p be the population proportion of adults who smoked a cigarette in the past week.

As per given , we have

$H_a: p$

Sample size : n= 1491

The sample proportion of adults smoked a cigarette= $\hat{p}=\dfrac{x}{n}=\dfrac{462}{1491}=0.30985915493\approx0.31$

The test statistic for proportion is given by :-

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

Substitute all the values , we get

$z=\dfrac{0.31-0.30}{\sqrt{\dfrac{0.30(1-0.30)}{1491}}}\\\\=\dfrac{0.01}{\sqrt{0.000141}}\\\\=\dfrac{0.01}{0.011874342087}=0.84261497731\approx0.84$

Hence, the value of the test statistic = 0.84

6 0

3 years ago

Segment BC is a midsegment of triangle TUV. What is the length of segment VC? (A)a (B)2b (C)b (D)c

Ganezh [65]

It would be twice whatever the midsegment equals.

7 0

3 years ago

A large room has a temperature of 70 degrees Fahrenheit. When a cup of tea is brought into the room, the tea has a temperature o

masya89 [10]

Answer:

91.3

Step-by-step explanation:

8 0

3 years ago

Write an equation about having 6 puzzles, getting 5 more and having a lot now.

sattari [20]

6+5=11
or
6+5=?
It shows we originally have 6 and now have 5 more having a total of 11

8 0

3 years ago

Lucy used 3 gal of paint to cover 900 ft. She needs to cover a total of 1,100 ft?.

insens350 [35]

Step-by-step explanation:

3 gal = 900 ft

... gal = 1100 ft

So, each gal is used for cover 300 ft,

Then,

$\sf \frac{1100}{900} \times 3 = \frac{11}{3} = \boxed{ \bold{ \red{3 \frac{2}{3} \: gal}}}$

We need <u>3 2/3 gal</u> to cover 1100 ft.

Hope it helps!

7 0

2 years ago