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4 years ago

Amazon was valued at 430 billion dollars. Write this number in scientific notation

Mathematics

1 answer:

pshichka [43]4 years ago

3 0

Answer:

430 billion (430,000,000,000) is 4.3 x 10^11 in scientific notation

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Answer:

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Step-by-step explanation:

6 times -2 is -12

6 + -2 is 4

And x +x is x^2

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3 years ago

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The area of a circle, in terms of π, is 80π m2. Find the value of the radius. Give your answer as a simplified surd.

jolli1 [7]

Answer:

$r=4\sqrt{5}\:\: \sf m$

Step-by-step explanation:

$\textsf{Area of a circle}=\pi r^2 \quad \textsf{(where r is the radius)}$

Given:

Area = 80π m²

Substitute the given value into the formula and solve for r:

$\implies 80 \pi = \pi r^2$

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$\implies 80=r^2$

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2 years ago

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Solve by adding or subtracting.<br> x+y=-10<br> 2x-y=-8

riadik2000 [5.3K]

Answer:

$x=-6\\y=-4$

Step-by-step explanation:

To solve, isolate your first equation for y.

$x+y=-10\\y=-x-10$

Now, plug in this y value to your second equation.

$2x-(-x-10)=-8\\2x+x+10=-8\\3x+10=-8\\3x=-18\\x=-6$

Now, plug your x value into your first equation and solve for y.

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4 years ago

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Alex17521 [72]

Answer:

20/25=0.8 liters each

Step-by-step explanation:

22 players+3 Coaches= 25 people

These people need to divide 20 liters of water among themselves, so we just use division.

20 divided by 25 equals 0.8 liters/person. Hope you understand. :)

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4 years ago

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