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Firdavs [7]
3 years ago
8

Solve solve solve solve

Mathematics
2 answers:
Alex17521 [72]3 years ago
7 0

Answer:

64pi

Step-by-step explanation:

area= pi * r^2

sergij07 [2.7K]3 years ago
7 0

Answer:

201.06

Step-by-step explanation:

A=π x r^2

π x 8^2 = 201.06

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ale4655 [162]

Answer: 0.000021 in scientific notation is

2.1 × 10-5

Step-by-step explanation:

All numbers in scientific notation or standard form are written in the form

m × 10n, where m is a number between 1 and 10 ( 1 ≤ |m| < 10 ) and the exponent n is a positive or negative integer.

To convert 0.000021 into scientific notation, follow these steps:

Move the decimal 5 times to right in the number so that the resulting number, m = 2.1, is greater than or equal to 1 but less than 10

Since we moved the decimal to the right the exponent n is negative

n = -5

Write in the scientific notation form m × 10n

= 2.1 × 10-5

Therefore,

2.1 × 10-5 is the scientific notation form of 0.000021 number and 2.1e-5 is the scientific e-notation form for 0.000021

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