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3 years ago

Helppppppppp Can I get some help please

Mathematics

1 answer:

eimsori [14]3 years ago

8 0

Answer:

Step-by-step explanation:

6/1=48/8

48/8÷3/8=6

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Hundred Metal Spheres with a radius of 4cm each are melted. The melted solution is filled into a cube with a base area of 16cm x

Anna007 [38]

Answer:

Height = 167.47 cm

Step-by-step explanation:

volume of one sphere = 4/3πr³ = 4/3(3.14)(4³) = 267.9467 cm³

267.9467 cm³ x 100 spheres = 26794.67 cm³

volume of cube = L x W x H

26794.67 = 16 x 10 x H

H = 167.47 cm

4 0

3 years ago

In order to estimate the average time spent on the computer terminals per student at a local university, data were collected for

Setler [38]

Answer:

7) d)

standard error of the mean of one sample of 'n' observation = 0.20

8) a)

The margin of Error = 0.392

9) d

The 95% of confidence intervals are (8.61 , 9.39)

Step-by-step explanation:

solution:-

The Given data sample size 'n' = 81

Given Population standard deviation 'σ' = 1.8 hours

The standard error of the mean of one sample of 'n' observation is

Standard error (SE)

= $\frac{S.D}{\sqrt{n} }$

= σ / √n

= $\frac{1.8}{\sqrt{81} } =0.2$

standard error of the mean of one sample of 'n' observation = 0.20

Solution:-

The Given data sample size 'n' = 81

Given Population standard deviation 'σ' = 1.8 hours

Given the probability is 0.95

The z- score = 1.96 at 0.05 level of significance.

The margin of Error = $\frac{z_{0.95} S.D}{\sqrt{n} }$

= $\frac{1.96 (S.D)}{\sqrt{n} }$

= $\frac{1.96 (1.8)}{\sqrt{81} }$

= 0.392

The margin of Error = 0.392

Solution:-

The 95% of confidence intervals are

$(x^{-} - 1.96\frac{S.D}{\sqrt{n} } , x^{-} + 1.96\frac{S.D}{\sqrt{n} } )$

$(9 - 1.96\frac{1.8}{\sqrt{81} } , 9+ 1.96\frac{1.8}{\sqrt{81} } )$

(9 - 0.392 , (9 + 0.392)

(8.609 , 9.392)

The 95% of confidence intervals are (8.61 , 9.39)

4 0

3 years ago

ASAP WILL GIVE BRAINLIEST TO THE CORRECT ANSWER!!!!

defon

Answer:

Area: 168

Step-by-step explanation:

Area equals base times height. B= 14 and H= 12 so 14 × 12= 168

4 0

4 years ago

Read 2 more answers

Mark walks to school in 3 minutes. It takes Tom 4 times as long to walk to school as it does Mark. How long does it take Tom to

kvasek [131]

Answer:

12 minutes

Step-by-step explanation:

7 0

3 years ago

Find the sum of 2x^2-6x-2 and x^2+4x

Paul [167]

2x^2 -6x -2+x^2+4x

All you have to do is add like terms

2x^2+x^2

= 3x^2

-6x+4x

= -2x

Then add them together to get one equation

3x^2 -2x -2

I recommend you study how to add variables as these are very basic sums. Just practice :)

8 0

3 years ago