2 years ago

Pls help with math ASAP

Mathematics

1 answer:

jekas [21]2 years ago

6 0

#1; Yes, Proportional
#2; Not Proportional
#3; Yes, Proportional

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Compare the surface area-to-volume ratios of the moon and mars. express your answer using two significant figures.

antoniya [11.8K]

we know that

For a spherical planet of radius r, the volume V and the surface area SA is equal to

$V=\frac{4}{3} *\pi *r^{3} \\ \\ SA=4*\pi *r^{2}$

The
ratio of these two quantities may be written as

$SAV =\frac{(4*\pi*r^{2})}{(\frac{4}{3}*\pi*r^{3})} \\ \\ SAV =\frac{3}{r}$

we know

$rMoon=1,738Km\\ rMars=3,397 Km$

$\frac{SAV Moon}{SAV Mars} =\frac{3}{rMoon} *\frac{rMars}{3} \\ \\ \frac{SAV Moon}{SAV Mars} =\frac{rMars}{rMoon} \\ \\ \frac{SAV Moon}{SAV Mars} =\frac{3,397}{1,738} \\ \\ \frac{SAV Moon}{SAV Mars} =1.9545$

therefore

the answer is

$1.9$

5 0

3 years ago

Read 2 more answers

Who is farthest from the school

postnew [5]

Using the law of cosines:

The grocery store to the school:

Distance = √(7^2 + 10^2 - 2*7*10*cos(100)

Distance = 13.16 miles

The movie store to the school:

Distance = √(7^2 + 10^2 - 2*7*10*cos(120)

Distance = 14.80 miles

The friend is further away.

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3 years ago

There were two cheesecakes in the fridge. The first cheesecake was cut into 16 slices and there are 3 slices left. The other che

Elina [12.6K]

Answer:

31/80

Step-by-step explanation:

2/10 + 3/16

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2 years ago

Hello please help i’ll give brainliest

HACTEHA [7]

Answer:

b. option Is the correct answer right

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2 years ago

Which matrix represents the system of equations shown below?<br> x = 10<br> 3x-9y = 7

OlgaM077 [116]

Y=4.1 because it if take ten. And multiply it by three then take negative 9Y equals seven and divided by nine gives you 4.1

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2 years ago