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slava [35]
4 years ago
15

Add or subtract. Write your answer in scientific notation. 6.4 x 10^3+ 1.4 x 10^4+ 7.5 x 10^3

Mathematics
1 answer:
ycow [4]4 years ago
7 0

Answer:

2.79 * 10^4

Step-by-step explanation:

6.4 x 10^3+ 1.4 x 10^4+ 7.5 x 10^3

The exponents need to be the same

6.4 x 10^3+ 14 x 10^3+ 7.5 x 10^3

Add the numbers

6.4 + 14+ 7.5 =27.9

Multiply by the exponent

27.9 * 10 ^3

But this is not in scientific notation

Move the decimal one place to the left and add one to the exponent

2.79 * 10^4

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joey and helen are standing in opposite corners of a rectangular field. If the field has dimensions 120 ft by 209 ft, how far ap
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Answer:

They're 241 feet apart

Step-by-step explanation:

we know that

To find out the distance from opposite corners of a rectangle, apply the Pythagoras Theorem

we have

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where

c is the distance from opposite corners of a rectangle

a and b are the length and the width of rectangle

substitute the given values

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c=241\ ft

therefore

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7 0
3 years ago
Amelia wants to paint three walls in her family room. Two walls are 26 feet long by 9 ft wide. What is the total area of the wal
Ivan
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4 0
3 years ago
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azamat

Answer:

This is cluster sampling.

Step-by-step explanation:

American Airlines randomly selects 110 flights during a certain week and surveys all passengers on the flights.

This is a type of cluster sampling.

This type of sampling is done by dividing the population into different groups and a simple random sample of clusters is selected from the population.

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I have no clue help!?
vfiekz [6]

Answer:

Corresponding angles theorem.

Step-by-step explanation:

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