Round 363 to the nearest tens and hundreds

Claim: Most adults would erase all of their personal information online if they could. A software firm survey of 528 randomly s

Anettt [7]

Answer:

5.514

Step-by-step explanation:

we have given $\bar{p}$ =62% =0.62

n=528

claim : most of adults erase all their personal information online ( $p> 0.5$

p=0.5 q=1-p=1-0.5=0.5

now test statistic is

$\frac{\bar{p}-p}{\sqrt{\frac{pq}{n}}}=\frac{0.62-0.5}{\sqrt{\frac{0.5\times 0.5}{528}}}=5.514$

so the test statistic =5.514

4 0

4 years ago

Martina is currently 18 years older than her cousin Joey in five years she will be three times as old as Joey use this informati

Karolina [17]

Answer:

The age of Joey is 4 years and

The age of Martina is 22 years .

Step-by-step explanation:

Given as :

Martina is 18 years older than her Joey

In 5 years, Martina will be three times older than Joey

Let The age of Martina = M years

And The age of Joey = J years

Now, According to questions

M = J + 18 ........1

(M+5) = 3 × (J+5)

Or, M + 5 = 3 J + 15

Or, M - 3 J = 15 - 5

∴ M - 3 J = 10 ..........2

Solving eq 1 and 2

Put the value of M from eq 1 into eq 2

So, (J + 18) - 3 J = 10

Or, J - 3 J = 10 - 18

Or, - 2 J = - 8

∴ J = $\dfrac{8}{2}$

i.e J = 4 years

So, The age of Joey = J = 4 years

Now, Put the value of J in eq 1

So, M = J + 18

Or, M = 4 + 18

∴ M = 22 years

So, The age of Martina = M = 22 years

Hence,The age of Joey is 4 years and The age of Martina is 22 years . Answer

7 0

3 years ago

A random variable x is uniformly distributed between 45 and 150: to 4 decimal places, what is the probability that x = 48?

klio [65]

It appears that the distribution in question may be a continuous uniform distribution. In that case there is an infinite number of possible values between 45 and 150. Therefore the probability that x is exactly 48 is zero.

8 0

4 years ago

Consider this scaled figure of a swimming pool. The dimensions of the original pool are 24 feet wide by 36 feet long. A rectangl

kozerog [31]

The scale factor used for scaling the actual rectangular pool was 4/15 and the length of the scaled rectangle is 9.6 feet.

<h3>How to calculate the scale factor?</h3>

Suppose the initial measurement of a figure was x units.

And let the figure is scaled and new measurement is of y units.

Since the scaling is done by multiplication of some constant, that constant is called scale factor. Let that constant be 's'.

Then we have:

$s \times x = y\\s = \dfrac{y}{x}$

Thus, scale factor is the ratio of the new measurement to the old measurement.

For this case, we're specified that:

Dimensions of the original pool = 24 feet wide by 36 feet long

The scaled rectangle's dimension: 6.4 feet width and L feet length (we assume the length be L units).

So, in scale drawing, 24 feet was converted to 6.4 feet. Let the scale factor be 's', then:

$6.4 = s \times 24\\\\s = \dfrac{6.4}{24} = \dfrac{4}{15}$

Thus, since length is also scaled by same factor(as the whole figure is scaled by constant scale factor assumingly), we get:

Scaled length = s times original length

$L = \dfrac{4}{15} \times 36 = 9.6 \: \rm feet$

Thus, the scale factor used for scaling the actual rectangular pool was 4/15 and the length of the scaled rectangle is 9.6 feet.

Learn more about scale factors here :

brainly.com/question/8765466

5 0

2 years ago

I dont understand what im supposed to do .

marissa [1.9K]

Answer:

come to my house honey i live in yo addict

Step-by-step explanation:

ahhhhhs

6 0

3 years ago