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3 years ago

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You have a 10kg bag of sand. the mass of a grain of sand is about 10 to the -3 power gram. about how many grains of sand are in

the bag of sand

1 answer:

Vlad [161]3 years ago

4 0

N = 10^3 / 10^-3 = 10^6 = 1 million

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Answer:

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Step-by-step explanation:

We have been given a triangle. We are asked to find the measure of angle Z using Law of cosines.

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Upon substituting our given values in law of cosines, we will get:

$16^2=19^2+18^2-2(19)(18)\cdot \text{cos}(Z)$

$256=361+324-684\cdot \text{cos}(Z)$

$256=685-684\cdot \text{cos}(Z)$

$256-685=685-685-684\cdot \text{cos}(Z)$

$-429=-684\cdot \text{cos}(Z)$

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$0.627192982456=\text{cos}(Z)$

$\text{cos}(Z)=0.627192982456$

Now, we will use inverse cosine or arc-cos to solve for angle Z as:

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$Z=51.1566718^{\circ}$

$Z\approx 51^{\circ}$

Therefore, the measure of angle Z is approximately 51 degrees.

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Step-by-step explanation:

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51 1/10 + 10 9/10 = 62

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Step-by-step explanation:

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Step-by-step explanation:

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