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Rudiy27
3 years ago
6

What is scientific notation?

Mathematics
2 answers:
horsena [70]3 years ago
8 0

Scientific notation is basically a shortcut for writing numbers. Scientists use it all the time if they are writing numbers that are very large or very small. If you encounter numbers that have many zeros at the end, you can use scientific notation to save your time. When using scientific notation, you're allowed to simplify all the zeros that you have in the number by writing the number as a product of a number and a power of 10.

Montano1993 [528]3 years ago
7 0
An expression to represent a decimal between 1 and 10 multiplied by ten. basically to write larger numbers with less digits.
 ex . 100 = 1 x 10^2
ex. 4321= 4.321 x 10^3
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An electronic device that previously sold for $21.00 has been reduced to $17.43. The price reduction, rounded to the near east w
svet-max [94.6K]

The percentage of reduction is 17%

<u>Explanation:</u>

Original price = $21

Reduced price = $17.43

Percentage of reduction = ?

Difference in price = $21 - $17.43

                               = $3.57

Percentage of reduction = \frac{difference}{original} X 100

                                         = \frac{3.57}{21} X 100\\\\= 17

Therefore, percentage of reduction is 17%

7 0
2 years ago
the hypotenuse of a right triangle is 3 cm and one of the legs is 1 cm what is the length of the other leg ?
Afina-wow [57]

Answer:

2\sqrt{2}

Step-by-step explanation:

let the other leg be x

Using Pythagoras' identity

The square on the hypotenuse is equal to the sum of the squares on the other 2 sides, that is

x² + 1² = 3²

x² + 1 = 9 ( subtract 1 from both sides )

x² = 8 ( take the square root of both sides )

x = \sqrt{8}

  = \sqrt{4(2)}

  = \sqrt{4} × \sqrt{2} = 2\sqrt{2} ← exact value

4 0
3 years ago
What is an algebraic expression for "40 more than b?
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Answer:

40 + b

Step-by-step explanation:

40 more than b = 40 + b

5 0
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Step-by-step explanation:

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