What is the area of a triangle with a base of 7 mm and a height of 10 mm

Mathematics

1 answer:

galina1969 [7]3 years ago

5 0

Answer:

A≈3.5×10-5m²

Step-by-step explanation:

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Karo-lina-s [1.5K]

$\text{The scientific notation:}\\\\a\times10^n\\\\1\leq a$

$a.\\(5\times10^3)\times(3.5\times10^{-1})=(5\times3.5)\times(10^3\times10^{-1})\\\\=15.75\times10^{3+(-1)}=15.75\times10^2=1.575\times10\times10^2\\\\=1.575\times10^{1+2}=\boxed{1.575\times10^3}$

$b.\\(8\times10^2)\div(4\times10^3)=(8\div4)\times(10^2\div10^3)=2\times10^{2-3}\\\\=\boxed{2\times10^{-1}}$

$c.\\(6\times10^{-3})^2=6^2\times(10^{-3})^2=36\times10^{-3\cdot2}=36\times10^{-6}=3.6\times10\times10^{-6}\\\\=3.6\times10^{1+(-6)}=\boxed{3.6\times10^{-5}}$

$Used:\\\\a^n\times a^m=a^{n+m}\\\\a^n\div a^m=a^{n-m}\\\\(a^n)^m=a^{n\cdot m}$

5 0

3 years ago

The sample variance of hourly wages was 10. what is the sample standard deviation?

lapo4ka [179]

Standard deviation is defined as the quantity which expresses by how much the members of a group is different from the mean value for the group.

The sample standard deviation with a sample variance of hourly wages 10 will be $3.16.

Explanation:

The standard deviation is the square root of the variance.
Therefore,
The square root of 10 dollars can be calculated as:

√10 = $3.16

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3 years ago

What is the area of a triangle with a base of 7 mm and a height of 10 mm￼

What is the area of a triangle with a base of 7 mm and a height of 10 mm