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mezya [45]
3 years ago
8

Write the following using index notation 9 x 7 x 9 x 9 x 7 x 9​

Mathematics
1 answer:
Vikentia [17]3 years ago
8 0
We just have to group the like terms together. So there are 4 nines and 2 sevens.

That would make it; 9^4 x 7^2

9 to the power of 4 multiplied by 7 to the power of 2(the second power).



Mark as Brainliest if it helped! :)
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The population density of the world is calculated by finding the ratio of the total number of people in the world to the area of
Romashka [77]

Answer:

51

Step-by-step explanation:

A = Surface area of the Earth = 1.5\times 10^8\ \text{km}^2

Total number of people on Earth = 7.594 billion as of 2018 = 7.594\times 10^9

We need to find the number of people living in each square km of land area.

So, we need to divide the number of people by the land area of the Earth.

1.5\times 10^8\ \text{km}^2=7.594\times 10^9\ \text{people}

\Rightarrow 1\ \text{km}^2=\dfrac{7.594\times 10^9}{1.5\times 10^8}

\Rightarrow 1\ \text{km}^2=50.63\approx 51\ \text{people}

So, 51 people will inhabit each square km of land area.

5 0
3 years ago
Lisha is making headbands using ribbon she would like to make 12 headbands each one requires 15.5 inches of ribbon she estimates
Firlakuza [10]

Answer:

Step-by-step explanation:

Lisha is making headbands using ribbon.

each one requires 15.5 inches of ribbon

For 12 headbands Lisha need to buy ribbon = 15.5 × 12

                                                                         = 186 inches

Therefore, Lisha will need to buy 186 inches ribbon.

160 inches ribbon is not sufficient to make 12 headbands. She will need to buy 186 inches or more.

4 0
4 years ago
Read 2 more answers
Jackrabbits are capable of reaching up to 40 miles per hour. How fast is this in feet per second? ( round to the nearest whole n
yawa3891 [41]

Jackrappits can reach a speed of about 59 feet per second.

8 0
3 years ago
I already give you the answer for number 19 but can you please explain. And then can you tell me what question number 20 is and
madreJ [45]
So, You know the outer angle, so you need to know the inner angle on <B. so 180-148 is 32. since you know two of the inside angles, and all triangle angles add up to 180 degrees, take 32+83, which is 115, and subtract that from 180, which is 65
Hope this helps!
Vote me brainliest!
5 0
4 years ago
What pair of factors of −42 has a sum of 1? PLEASE HELP
anastassius [24]

Answer:

-6 and 7

Step-by-step explanation:

-6 and 7 multiply to be -42.

When you add the two values: -6+7=1

Their sum is 1!

Hope this helps

4 0
4 years ago
Read 2 more answers
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