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3 years ago

Is 25,365 cm greater or less than 30 m

Mathematics

1 answer:

anyanavicka [17]3 years ago

6 0

25365cm÷100=m
=253.65m
25365 is less than 30m

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A plane flew 720 mi with a steady 30 mi/h tailwind. The pilot then returned to the starting point, flying against that same wind

NNADVOKAT [17]

Answer:

Plane's speed is 150 miles/hour

Step-by-step explanation:

Let the plane's airspeed be x

Speed of wind is 30 miles/hour

When a plane flew with the wind , Speed = (x+30)

So, the speed plain with wind on going = (x+30)

Since we are given that on returning plane fly against the wind .

So,When a plane flew against the wind , Speed = (x-30)

So, the speed plain against wind on returning = (x-30)

Distance = 720 miles .

$Time = \frac{Distance}{Speed}$

So, time on going $=\frac{720}{(x+30)}$

Time on returning $=\frac{720}{(x-30)}$

Now we are given that the total time for the whole trip (going + returning) = 10 hours.

So, $\frac{720}{(x+30)}+\frac{720}{(x-30)}=10$

$\frac{720x-21600+720x+21600}{(x+30)(x-30)}=10$

$720x-21600+720x+21600=10(x+30)(x-30)$

$720x+720x=10(x+30)(x-30)$

$1440x=10(x^2 -[30]^2)$

$144x=x^2 -900$

$x^2-144x -900=0$

$x^2-150x+6x -900=0$

$x(x-150)+6(x -150)=0$

$(x-150)(x+6)=0$

$x= 150,x= -6$

So, the plane's speed is 150 miles/hour

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3 years ago

Help! Is the data skewed or symmetric?

KATRIN_1 [288]

Answer:

i believe it is skewed. sorry if its wrong

Step-by-step explanation:

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if we try answer C -8+7=-1 so the answer is not C because we want +1 not -1
then we see that 8+(-7)=1 so the answer is A

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leonid [27]

Answer:

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Step-by-step explanation:

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3 years ago

Here its hard and i need help thank you

vagabundo [1.1K]

Answer:

the volume of a cylinder = V=Ah =pirsqh

=pie × r sq × h

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= 1/3×3.14×4×4×9 = 150.72

volume of cylinder = 2×pi×r×h+2×pi× r×r

=241.645

not sure choose the ones you think a closest?

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