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Anna71 [15]
3 years ago
11

The planet Venus has a mass of 4.869 ∙ 1024 kilograms. Use scientific notation to express the planet’s mass in milligrams. 1 kil

ogram = 1,000,000 milligrams
Mathematics
2 answers:
Ostrovityanka [42]3 years ago
7 0
<span>To do this you need to multiple 1,024 by 1,000,000 to get 1,024,000,000 and then convert it to scientific notation. For that you need to know how many places there are after the first number. In this case it is 9. This will be 1.024 x 10^9. You have to remember that it is to the power of however many numbers are after the first. So even though we show 3 digits after the . we still have to include those in the power.</span>
storchak [24]3 years ago
7 0

Answer:

4.869 × 10³⁰ milligrams        

Step-by-step explanation:

A number written in scientific rotation is a number between 1 and 10 multiplied with the power of 10.

We know that

1 kilogram = 1,000,000 milligrams =1.0 × 10⁶ milligrams

4.869 × 10²⁴ kilograms can be written as:

4.869 × 10²⁴ × 1.0 × 10⁶ milligrams = 4.869 × 10³⁰ milligrams

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The answer is 54 cubes.

Step-by-step explanation:

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3 years ago
Nick was surveying his field and saw some cows and ducks. Nick counted a total of 80 heads and
Natali [406]

Answers:

  • Total equation:  x+y = 80
  • Legs equation:  2x+4y = 248
  • How many ducks? 36
  • How many cows? 44

====================================================

Further explanation:

  • x = number of ducks
  • y = number of cows

x+y = 80 is the total equation (ie the head count equation) since we assume each animal has 1 head, and there are 80 heads total.

That equation can be solved to y = 80-x after subtracting x from both sides.

The legs equation is 2x+4y = 248 because...

  • 2x = number of legs from all the ducks only
  • 4y = number of legs from all the cows only
  • 2x+4y = total number of legs from both types of animals combined

We're told there are 248 legs overall, so that's how we ended up with 2x+4y = 248

------------

Let's plug y = 80-x into the second equation and solve for x.

2x+4y = 248

2x+4( y ) = 248

2x+4( 80-x ) = 248

2x+320-4x = 248

-2x+320 = 248

-2x = 248-320

-2x = -72

x = -72/(-2)

x = 36

There are 36 ducks

Now use this x value to find y

y = 80-x

y = 80-36

y = 44

There are 44 cows.

------------

Check:

36 ducks + 44 cows = 80 animals total

36*2 + 44*4 = 72 + 176 = 248 legs total

The answers are confirmed.

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There are 84 boys in a senior class of 146 students. find the ratio of boys to girls. (note: if you know the total number of stu
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Answer:

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Step-by-step explanation:

The line going horizontal is the X-axis. And they line going up and down is the y-axis. The way you write the location of a point is (X,Y). Hope this helps!!

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Answer:

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Step-by-step explanation:

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