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2 years ago

What is the density of Olivine? Mass = 20g; Volume = 6.15 cubic cm. Round to TWO decimal places

Mathematics

1 answer:

vovangra [49]2 years ago

5 0

3.25 cubic cm per gram

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Whats 9 + 10

romanna [79]

Answer:

19 BUT BACK IN 2015 OR 2011 IR 2013 ITS TO BE 21 AS A JOKE IT USED TO BE VERY FUNNY LIKE WANT 9 PLUS 10 21 HAHAHAHAHAHAHAHAHA

Step-by-step explanation:

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2 years ago

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The reminder when the square of any prime number greater than 3 is divided by 6 is

tresset_1 [31]

Answer:

(A) 1(B) 3 (C) 2(D) 4

Step-by-step explanation:

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2 years ago

8% of 60 is half of what number

tatiyna

Answer:

9.6

Step-by-step explanation:

8% of 60 is 4.8

4.8 is half of 9.6

hope this helps! :D

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1 year ago

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What does x equal??

Julli [10]

X = 33 °

Since PQS forms a 90 degree angle, subtract 57 (from PQR) to get RQS.

90-57=33

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2 years ago

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A tank holds 300 gallons of water and 100 pounds of salt. A saline solution with concentration 1 lb salt/gal is added at a rate

Shkiper50 [21]

The amount of salt in the tank changes with rate according to

$Q'(t)=\left(1\dfrac{\rm lb}{\rm gal}\right)\left(4\dfrac{\rm gal}{\rm min}\right)-\left(\dfrac{Q(t)}{300+(4-1)t}\dfrac{\rm lb}{\rm gal}\right)\left(1\dfrac{\rm gal}{\rm min}\right)$

$\implies Q'+\dfrac Q{300+3t}=4$

which is a linear ODE in $Q(t)$ . Multiplying both sides by $(300+3t)^{1/3}$ gives

$(300+3t)^{1/3}Q'+(300+3t)^{-2/3}Q=4(300+3t)^{1/3}$

so that the left side condenses into the derivative of a product,

$\big((300+3t)^{1/3}Q\big)'=4(300+3t)^{1/3}$

Integrate both sides and solve for $Q(t)$ to get

$(300+3t)^{1/3}Q=(300+3t)^{4/3}+C$

$\implies Q(t)=300+3t+C(300+3t)^{-1/3}$

Given that $Q(0)=100$ , we find

$100=300+C\cdot300^{-1/3}\implies C=-200\cdot300^{1/3}$

and we get the particular solution

$Q(t)=300+3t-200\cdot300^{1/3}(300+3t)^{-1/3}$

$\boxed{Q(t)=300+3t-2\cdot100^{4/3}(100+t)^{-1/3}}$

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2 years ago