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3 years ago

A search plane covers 50 square miles of countryside. How many hectares does the plane search?

Mathematics

2 answers:

LUCKY_DIMON [66]3 years ago

7 0

The plane has searched 12,950 hectares. the ratio between hectares to square miles is: 1 hectare is 2.471 acres

ollegr [7]3 years ago

4 0

Answer:

Step-by-step explanation:

This is a unit conversion from $[mi^{2} ]$ to $[ha]$ which is done using the equivalence:

$1 mi^{2}= 258.9988110336 ha$

and its done like this:

$50 mi^{2}*\frac{258.9988110336 ha}{1 mi^{2} } =12949.94055 ha$

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(−2)∙(2a−b)+3(a+b) plz help

tangare [24]

Answer:

-a+5b

i hope this help you out ;)

3 0

3 years ago

The data show the average monthly temperatures for two cities over a 6-month period. City 1: {20, 24, 40, 63, 76, 89} City 2: {4

Mrac [35]

Answer:

The MAD of city 2 is less than the MAD for city 1, which means the average monthly temperature of city 2 vary less than the average monthly temperatures for City 1.

Step-by-step explanation:

For comparing the mean absolute deviations of both data sets we have to calculate the mean absolute deviation for both data sets first,

So for city 1:

$Mean = x1 = \frac{20+24+40+63+76+89}{6}$

$x1 = \frac{312}{6}$

$x1 = 52$

Now to calculate the mean deviations mean will be subtracted from each data value. (Note: The minus sign is ignored as the deviation is the distance of value from the mean and it cannot be negative. For this purpose absolute is used)

$20-52 = -32=32\\24-52=-28=28\\40-52=-12=12\\63-52=11\\76-52=24\\89-52=37$

The deviations will be added then. $Mean Absolute Deviation = \frac{32+28+12+11+24+37}{6} \\=\frac{144}{6}\\=24$

So the mean absolute deviation for city 1 is 24 ..

For city 2:

$Mean = x2 = \frac{41+50+58+62+72+83}{6}$

$x2 = \frac{366}{6}$

$x2 = 61$

Now to calculate the mean deviations mean will be subtracted from each data value. (Note: The minus sign is ignored)

$41-61=-20=20\\50-61=-11=11\\58-61=-3=3\\62-61=1\\72-61=11\\83-61=22$

The deviations will be added then. $Mean Absolute Deviation = \frac{20+11+3+1+11+22}{6} \\=\frac{68}{6}\\=11.33$

So the MAD for city 2 is 11.33 ..

So,

The MAD of city 2 is less than the MAD for city 1, which means the average monthly temperature of city 2 vary less than the average monthly temperatures for City 1.

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3 years ago

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URGENT EXPLANATION AND SOLVING

Alex787 [66]

$\cfrac{a}{\sin(a)} = \cfrac{b}{\sin(b)} 
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$\cfrac{31}{\sin(42)} = \cfrac{37}{\sin(x)} 
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$31\sin(x) = 37 \sin(42)$

$\sin(x) = \cfrac{37 \sin(42) }{31}$

$x = \sin^{-1}(\cfrac{37 \sin(42) }{31} )$

$x = 53 \textdegree$

Answer: 53°

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3 years ago

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If there are 14 people, and each person has 2 coins, there are ____ times as many coins as people.

IgorLugansk [536]

Hi so u would multiply then add 2 to get ur answer

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Solve the equation -2( 1 - 5v)

inn [45]

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