Ask question

Ask question

All categories

3 years ago

5

The bedroom of a house is 1,200 cubic meters. We know that there are 3.4 x 109 particles of dust per cubic meter. How many parti

cles of dust are present in the bedroom of the house

1 answer:

Brrunno [24]3 years ago

3 0

Norteo lo se
awdwqmedowmesdsaa sddasdasdasd asdasd asdqasd asd

You might be interested in

Please help me with this question!!

aleksklad [387]

Answer:

it would be J

Step-by-step explanation:

the number line is going 1 in both directions from zero, the question is asking you to find what -1/2 is on the other side of the number line, so you are looking for 1/2 k is 1/4 and L is -1/4

7 0

3 years ago

Read 2 more answers

What is the ordered pair solution for this system of equation X+y=8<br> Y=x-3

Korvikt [17]

Answer:

(5.5, 2.5)

Step-by-step explanation:

Plug in X and Y and guess is how I did it

6 0

3 years ago

Helppp meee plssss

Volgvan

Answer:

Cost of fish = Php. 60, amount of fish = x kg
Cost of chicken = Php. 120, amount of chicken = y kg
Budget = at most Php. 1200

a) <u>Required inequality (not a system as only one condition is given):</u>

60x + 120y ≤ 1200

<u>Simplified:</u>

x + 2y ≤ 20

<em>The graph is attached</em>

b) <u>Verify ordered pair (10, 7):</u>

10 + 2*7 ≤ 20
24 ≤ 20

False inequality, so this pair is out of solution set

8 0

3 years ago

In 1990, 1000 adults were randomly selected and each was asked if they smoked, 300

Oduvanchick [21]

Answer:

The proportion of smokers was higher in 1990 than in 2000

Step-by-step explanation:

Solution

Recall that,

The total number of sample 1 (n1) = 1000

Total sample 2 number (n2) = 2000

The number of favourable events (X1) = 300

The number of favourable events (X2) = 500

so,

p₁ = X₁/n₁ = 300/1000 = 0.3

p₂ = X₂/n₂ =500/2000 =0.25

α = 0.05

We are interested in testing the hypothesis.

The hypothesis (Null) ....> H₀ : p₁ = p₂

Alternate hypothesis------ > H₁ : p₁ > p₂

Thus,

P = X₁ + X₂/ n₁ + n₂

P =300 + 500/1000 +2000

P =800/3000

=0.2667

Now,

Z₀ = P₁ - P₂/√ P (1 -P) (1/n₁ + 1/n₂)

Z₀ = 0.3 - 0.25/√0.2667 (1 - 0.2667) (1/1000 + 1/2000)

Z₀ = 0.4999999999999999/√ 0.2667 (0.7333000000000001) (0.001 +0.0005)

Then,

Z₀ = 0.4999999999999999/√0.00029335666500000004

Z₀ = 2.9193

so,

zα/2 = z0.05/2 =z0.025

zα/2 = 1.6448536269514722

Now, we apply the decision rule:

Decision Rule: Reject the null hypothesis if the statistic value test is higher than the critical value 1.6448536269514722

The statistic value, 2.9193 is greater than the critical value 1.6448536269514722, then we will reject the null hypothesis.

Therefore, the proportion of smokers was higher in 1990 than in 2000

3 0

3 years ago

Help please<br> 8. What is mZHTA?

klemol [59]

Answer:

67

Step-by-step explanation:

6 0

3 years ago