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3 years ago

A satellite moves at a speed of 27,000 kilometers per hour. Write four numbers that could be the actual speed of the satellite.

Mathematics

2 answers:

Anon25 [30]3 years ago

7 0

27,000 kilometers per hour equals

16777 miles per hour
24606 Feet per second
7500 Meters per second
14759 Knots

mash [69]3 years ago

3 0

Step-by-step explanation:

The speed of the satellite is 27,000 km/hour. There can be many units of speed i.e. meter per second, feet per second, miles per hour and knot. Firstly, we will use the following conversions as :

1 kilometer/hour = 0.2777 meter/second

Speed of satellite, v = 7500 m/s

1 kilometer/hour = 0.621 miles/hour

Speed of satellite, v = 16777.022 miles/hour

1 kilometer/hour = 0.911344 feet/second

Speed of satellite, v = 24606.29 ft/s

1 kilometer/hour = 0.539957 knots

Speed of satellite, v = 14578.834 knots

Hence, this is the required solution.

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3 years ago

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2 years ago

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ANSWER:

104

STEP-BY-STEP EXPLANATION:

Given:

Standard deviation (σ) = 700

Confidence level = 95%

Mean error (Eμ) = 135

We have for a confidence level of 95%:

$\begin{gathered} \alpha=100\%-95\%=5\%=0.05 \\ \\ \alpha\text{/2}=\frac{0.05}{2}=0.025 \\ \\ \text{ The corresponding Z value for \alpha/2 = 0.025 is as follows:} \\ \\ Z_{\alpha\text{/2}}=1.96 \end{gathered}$

Now, we calculate the minimum value of the sample size as follows:

$\begin{gathered} n=\left(\frac{Z_{\alpha\text{/2}}\cdot\sigma}{E}\right)^2 \\ \\ \text{ We replacing:} \\ \\ \:n=\left(\frac{1.96\cdot 700}{135}\right)^2 \\ \\ \:n=103.2858\cong104 \end{gathered}$

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1 year ago

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3 years ago

Using this formula l=A 1/2 what is the length of one side of a square with an area of 1,936 square kilometers? (A is the area of

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c.)44 kilometers

Answer:

Solution given:

let

length =L

and

Area =A

Now

we have

Area [A]=1936 square kilometers

now

As we know that

Area of square :length *length

A=l*l

A=l²

Substituting value of A

1936=l²

doing square root on both side

$\sqrt{1936}=\sqrt{l²}$

we get

l= $\sqrt{2*2*2*2*11*11}$

l=2*2*11

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