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3 years ago

A 500-kg car has 25,000 joules of kinetic energy. What is its speed?

Mathematics

1 answer:

Lelu [443]3 years ago

7 0

(m.v^2)/ 2 = 25000
<=> 500.v^2 = 50000
<=> v^2 = 100
<=> v = 10 m/s

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Candice bought 4 boxes of cereal. If each box costs $3.75 and c represents how much she spent in all, which equation represents

jekas [21]

Answer:

c=4×$3.75

Step-by-step explanation:

It would be the problem above because c is the total which equals the total of 4×$3.75.

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3 years ago

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Select the correct answer

Amiraneli [1.4K]

Answer:

c or d

Step-by-step explanation:

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3 years ago

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3 years ago

A sport analyst wants to determine the mean salary of a Baseball player for 2015. He believes an estimate of this average salary

djyliett [7]

Answer:

The large sample size 'n' = 199.6569≅ 200

Step-by-step explanation:

Step(i):-

Given Standard deviation of salary for all baseball players for 2015 is about $5,478,384.55

Standard deviation of of salary for all baseball players for 2015

(S.D ) σ = $5,478,384.55

Given estimate of this average salary for all baseball players for 2015

= $497,000

Given Margin of error of error is = $497,000

Level of significance ∝ = 80%

The critical value Z₀.₂₀ = 1.282

Step(ii):-

Margin of error of error is determined by

$M.E = \frac{Z_{0.20} S.D}{\sqrt{n} }$

$497,000 = \frac{1.282 X 5,478,384.55}{\sqrt{n} }$

Cross multiplication , we get

$\sqrt{n} = \frac{1.282 X 5,478,384.55}{497,000 }$

On calculation , we get

√n = 14.13

Squaring on both sides, we get

n = 199.6569

Conclusion:-

The large sample size 'n' = 199.6569≅ 200

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3 years ago

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kow [346]

3/10 times 2/3 3 times 2 is 5 and 10 times 3 is 30 5/30 a

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