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Rufina [12.5K]
3 years ago
10

Can anyone answer these two questions for me ?

Mathematics
2 answers:
Nookie1986 [14]3 years ago
8 0

Answer:

9. A and 11. c

Step-by-step explanation:

I hope this helps

omeli [17]3 years ago
4 0

Answer: both c

Step-by-step explanation:

           9 is u can multiply 6x 8 when u cut one of the rectangles into 4s, u can see that each of the piece is worth 12, so 48+36+36=120

           11 Is u can see 1 square unit is each of the boxes. U can infer that 4 of the square units will be able to fit in that shape.

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Pls someone help these answers are on chegg so if u have a subscription pls answer these ill make u brainliest ! Below is a tabl
aivan3 [116]

The table is not clear, so i have attached it.

Answer:

z statistic is -2.26

This is less than our alpha level,therefore we reject the null hypothesis and conclude that there is a significant difference in the proportion of homeowners between first generation and second generation Hispanic Americans

Step-by-step explanation:

From the attached table, we can see that;

first-generation hispanic americans; (N = 899 and percentage = 43%

second-generation hispanic americans; N = 351 and percentage = 50%

first-generation asian americans; (N = 2,684 and percentage = 58%

second-generation asian americans; N = 566 and percentage = 51%

Z-score formula in this case is;

z = (p1^ - p2^)/(√(p^(1 - p^)((1/n1) + (1/n2))

Where;

p^ = (p1 + p2)/(n1 + n2)

For, hispanic americans we have;

p1^ = 0.43 × 899 = 386.57

p2^ = 0.5 × 351 = 175.5

p^ = (386.57 + 175.5)/(899 + 351)

p^ = 0.45

Thus;

z = (0.43 - 0.5)/(√(0.45(1 - 0.45)((1/899) + (1/351))

z = -2.26

From z-distribution table, we have;

P-value = 0.01191

Since we have 2 samples, then probability = 2 × 0.01191 = 0.02382

This is less than our alpha level of 0.05,therefore we reject the null hypothesis and conclude that there is a significant difference in the proportion of homeowners between first generation and second generation Hispanic Americans.

3 0
3 years ago
For a sample size n = 24 and a population parameter of p = 0.4, a normal curve can be used to approximate the sampling distribut
Kipish [7]

Answer:False

Step-by-step explanation:

6 0
3 years ago
A sample of 64 observations has been selected to test whether the population mean is smaller than 15. The sample showed an avera
KengaRu [80]

Answer:

Test statistic = - 0.851063

- 2.520463

Step-by-step explanation:

H0 : μ ≥ 15

H1 : μ < 15

Sample mean, xbar = 14.5

Sample standard deviation, s = 4.7

Sample size = 64

Teat statistic :

(xbar - μ) ÷ (s/√(n))

(14.5 - 15) ÷ (4.7/√(64))

= - 0.851063

The critical value at α = 0.05

Using the T - distribution :

Degree of freedom, df = 64 - 1 = 63

Tcritical(0.05, 63) = 1.6694

Test statistic - critical value

-0.851063 - 1.6694

= - 2.520463

8 0
3 years ago
Each cube in this figure is a -millimeter cube. What is the total volume of the prism?
alekssr [168]

Answer:

  • D. 9 mm³

Step-by-step explanation:

<u>Given</u>

  • Dimension of the prism: 3x4x6
  • Side of each small cube: 1/2 mm

<u>Volume of the prism in terms of the number of small cubes:</u>

  • 3*4*6 = 72

<u>Volume of each unit cube:</u>

  • V = (1/2)³ = 1/8 mm³

<u>Volume of the prism:</u>

  • 72*1/8 = 9 mm³

Correct choice is D

7 0
3 years ago
Read 2 more answers
A train travels 70 kilometers in 4 hours, and then 55 kilometers in 3 hours. What is its average speed?
Naya [18.7K]

Answer:

Distance = 70 + 55 = 125 kilometers

Time = 4 + 3 = 7 hours

Rate = Distance / Time

Rate = 125 / 7 = 17.8571428571 kilometers per hour

Step-by-step explanation:


6 0
3 years ago
Read 2 more answers
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