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KATRIN_1 [288]
3 years ago
9

What is the density of the oak board, it's 5.5 inches wide, 1.5 inches thick , 3 feet long and weighs 8.05 lbs? Please show work

, will mark brainliest.
Mathematics
1 answer:
laiz [17]3 years ago
8 0

Answer:

37 - 56 lb / ft3

0.6 - 0.9 103 kg / m3

Step-by-step explanation:

The density or hardness of wood varies by species, and the value is necessary to approximate the weight of lumber by volume. In this table, the density of different species of wood is expressed as weight in pounds per cubic foot and kilograms per cubic meter. The density will vary based on the moisture content of the wood.

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3 years ago
In the past, the population proportion of consumers preferring orange juice with no pulp was equation. To test if this populatio
geniusboy [140]

Answer:

Step-by-step explanation:

We would set up the hypothesis test. This is a test of a single population mean since we are dealing with mean

a) For the null hypothesis,

P = 0.45

For the alternative hypothesis,

P ≠ 0.45

b) For the decision rule, we would reject H0 if 0.1 > p value and accepth H0 if 0.1 < p value

Considering the population proportion, probability of success, p = 0.45

q = probability of failure = 1 - p

q = 1 - 0.45 = 0.55

Considering the sample,

Sample proportion, p = x/n

Where

x = number of success = 52

n = number of samples = 120

p = 52/120 = 0.43

c) We would determine the test statistic which is the z score

z = (p - P)/√pq/n

z = (0.43 - 0.45)/√(0.45 × 0.55)/120 = - 0.44

Recall, population proportion, P = 0.45

The difference between sample proportion and population proportion(P - p) is 0.45 - 0.43 = 0.02

Since the curve is symmetrical and it is a two tailed test, the p for the left tail is 0.45 - 0.02 = 0.43

the p for the right tail is 0.45 + 0.02 = 0.47

These proportions are lower and higher than the null proportion. Thus, they are evidence in favour of the alternative hypothesis. We will look at the area in both tails. Since it is showing in one tail only, we would double the area

From the normal distribution table, the area below the test z score in the left tail 0.3336

We would double this area to include the area in the right tail of z = 0.44 Thus

p = 0.3336 × 2 = 0.67

d) Since alpha, 0.1 < than the p value, 0.67, then we would fail to reject the null hypothesis. Therefore, at a 1% level of significance, we do not have enough evidence to reject the​ null hypothesis

4 0
3 years ago
I’ve been struggling pls help i will kiss u. !!4?2737/!4
Snezhnost [94]

Answer:

The correct answer is C

Step-by-step explanation:

8 0
3 years ago
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Se desconoce el número de alumnos que hay en una clase de repostería, cada alumno elaborará una galleta para cada compañero una
svetoff [14.1K]

Answer:

nsjsisjsjwisujssjnsmjsjsjsk jdjdjdjdjdjdjdjdjdjjsjsjxjdjdjnwbshxijandbvdjxkwksndndjjxisjsknendjjjxjzjzjwjowi kwhhdiwiqihiwhsiwjjxiwijidwjjwisisiakskdhbdvfhsiiwnwndhidisiwjehhhhhhhhhhhhhhhhhhhsisjwngxxuiajqnwnbdhdkalapoiwurnxkanammxkbsjjsisisowjncnchshauwoskdmfbcucusiwkkfhdhd

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Let x be the middle integer of three consecutive integers. What is the sum of these three integers
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Answer:

because x is the middle integer of three consecutive integers

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=> the sum of these three integers is

x - 1 + x + x + 1 = 3x

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