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3 years ago

10

The star Alpha Centauri is approximately 40653230000000 kilometres from earth,write this number in standard form to 3 significan

t figures.

1 answer:

almond37 [142]3 years ago

8 0

4.065323 × 10^13
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Which expression is equvialent to this expression 3/4 (4h -6 )

Gekata [30.6K]

Answer:

are there choices?

Step-by-step explanation:

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3 years ago

Need help with this Q&A 4

ladessa [460]

Answer:

y=4x + 3/4

Step-by-step explanation:

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3 years ago

And 43 pls thank would help a lot

Furkat [3]

43. 125 milliliters

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3 years ago

Nitric acid (specific gravity 1.42) costs $51.95 per liter. A student spills 5.112 kg of nitric acid in the laboratory, what is

Leno4ka [110]

Answer:

The cost of wasted nitric acid is $187.02

Step-by-step explanation:

Since it is given that specific gravity of Nitric Acid is 1.42 Thus the density of nitric acid is

$\rho _{acid}=S.G\times \rho _{water}\\\\\\\rho_{acid}=1.42\times 1\frac{g}{cm^3}\\\\\rho_{acid}=1.42g/cm^3$

Now from the basic relation of mass volume and density we have

$\rho =\frac{Mass}{Volume}\\\\\therefore Volume=\frac{Mass}{\rho }$

Since the mass of the nitric acid is given to be 5.112 kg = 5112 grams

Thus the volume of nitric acid is

$Volume=\frac{5112}{1.42}=3600cm^3$

Now we know that 1000 cubic centimeters euals 1 litrer

Thus the calculated volume in liters is

$V_{liters}=\frac{3600}{1000}=3.6Liters$

Thus the cost of acid spilled equals

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5 0

3 years ago

Please help, I'm trying to finish these

umka2103 [35]

2 x length + 2 x width = perimeter.

2(2s-5) + 2(4s-13) = 108

Simplify:

4s-10 + 8s-26 = 108

Combine like terms:

12s - 36 = 108

Add 36 to both sides:

12s = 144

Divide both sides by 12:

s = 144/12

s = 12

Now replace s with 12 in each equation:

2(12) - 5 = 24-5 = 19

4(12) - 13 = 48-13 = 35

The answer is d. 35,35, 19,19

8 0

3 years ago

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