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Alekssandra [29.7K]

3 years ago

11

The average American is responsible for about 20,000 kilograms of carbon emission pollution each year. Express this number as a

single-digit integer times a power of 10

1 answer:

kondor19780726 [428]3 years ago

3 0

2 x 10000 = 20000

2 x 10 x 10 x 10 x 10

The answer is 2 x 10^4

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What is the length of the diagonal of a square with side lengths 7 square root of 2 ? round to the nearest tenth if necessary?

mr_godi [17]

There is 2 ways to solve this type of question.

Method 1
--------------------------------------------------
Formula
--------------------------------------------------
a² + b² = c²

--------------------------------------------------
Apply the formula
---------------------------------------------------
(7√2)² + (7√2)² = c²
c² = 98 + 98
c² = 196
c = √196
c = 14

--------------------------------------------------
Ans: The diagonal length is 14cm
--------------------------------------------------

_____________________________________________________________

Method 2
--------------------------------------------------
Identify the triangle
--------------------------------------------------
This is a special triangle
45° - 45° - 90°

--------------------------------------------------
Property of the Angles
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x - x - x√2

--------------------------------------------------
Find hypotenuse
--------------------------------------------------
Given that the non-hypotenuse is 7√2

Hypotenuse = (7√2)(√2)
Hypotenuse = 7 x 2
Hypotenuse = = 14cm

--------------------------------------------------
Ans: The diagonal length is 14cm
--------------------------------------------------

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SIZIF [17.4K]

The answer is the squared root of 7

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3 years ago

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