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3 years ago

The density of ice is what

Mathematics

1 answer:

maksim [4K]3 years ago

8 0

Answer:

The density of ice is 0.9167 g/cm3

Step-by-step explanation:

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Please help i need qn1!!

AlexFokin [52]

Answer:

1a) $m = \frac{60}{ \sqrt{31 - 2n} }$

b) 8.47 (3 s.f.)

Step-by-step explanation:

If y is inversely proportional to x, then $y = \frac{k}{x}$ , where k is a constant.

Since m is inversely proportional to $\sqrt{31 - 2n}$ ,

$m = \frac{k}{ \sqrt{31 - 2n} }$ , where k is a constant.

When n=3,

$m = \frac{k}{ \sqrt{31 - 2(3)} } \\ m = \frac{k}{ \sqrt{31 - 6} } \\ m = \frac{k}{ \sqrt{25} } \\ m = \frac{k}{5}$

when n=11,

$m = \frac{k}{ \sqrt{31 - 2(11)} } \\ m = \frac{k}{ \sqrt{31 - 22} } \\ m = \frac{k}{ \sqrt{9} } \\ m = \frac{k}{3}$

Since the sum of the values of m when n=3 and n=11 is 32,

$\frac{k}{3} + \frac{k}{5} = 32 \\ \frac{5k}{15} + \frac{3k}{15} = 32 \\ \frac{8k}{15} = 32 \\ 8k = 32(15) \\ 8k = 480 \\ k = 60$

a) $m = \frac{60}{ \sqrt{31 - 2n} }$

b) When m=16,

$16 = \frac{60}{ \sqrt{31 - 2n} } \\ 16( \sqrt{31 - 2n} ) = 60 \\ \sqrt{31 - 2n } = 60 \div 16 \\ \sqrt{31 - 2n} = 3.75 \\ 31 - 2n = 3.75^{2} \\ 31 - 14.0625 = 2n \\ 2n = 16.9375 \\ n = 8.47 \: (3 \: s.f.)$

6 0

4 years ago

There are xboys playing in the park. The number of girls playing in the park is equal to the square root of the number of boys.

harina [27]

Answer:

6.480

Step-by-step explanation:

im smart

8 0

3 years ago

Karen used one-third of her total stamps on a campaign for charity. Karen used 60 stamps on the charity campaign.

UkoKoshka [18]

I assume the answer is 180 but u have not put a question

7 0

3 years ago

Select the correct aswer.

Alex73 [517]

I think it is c but if smn has a different answer do with that instead

4 0

3 years ago

A 21,000 gallon swimming pool contains 9000 gallons of water when a hose is placed in the pool and begins adding water at a rate

Pavel [41]

It will take 8 hours to fill the swimming pool. There is already 9,000 gallons filled, that leaves you with 12,000. 12,000 divided by the rate per hour 1,500. That gives you 8.

7 0

4 years ago

Read 2 more answers