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3 years ago

Which statement is true?

Mathematics

2 answers:

vivado [14]3 years ago

6 0

-2.4 < -2.40

This is false because they are equal to each other/they are the same number. So -2.4 can't be less than -2.40.

-2.4 ≠ -2.40

This is false because they are equal to each other, as they are the same number.

-2.4 ≤ -2.40

This is true because -2.4 is equal to -2.40

-2.4 > -2.40

This is false because they are the same number, so -2.40 can't be less than -2.4.

The third choice is your answer.

RoseWind [281]3 years ago

3 0

The last one is true

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What is the square root of 625

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$De finition:\\\sqrt{a}=b\ \iff b^2=a\\=====================\\\\$

$625|5\\125|5\\.\ 25|5\\.\ \ 5|5\\.\ \ 1|\\\\625=5\times5\times5\times5=5^2\times5^2\\\\\sqrt{625}=\sqrt{5^2\times5^2}=(*)\\-------------------------------\\use:\ \sqrt{a\times b}=\sqrt{a}\times\sqrt{b}\ and\ \sqrt{a^2}=a\ for\ a\geq0\\-------------------------------\\(*)=\sqrt{5^2}\times\sqrt{5^2}=5\times5=\boxed{25}$

$Other\ solution:\\\\\sqrt{625}=25\ because\ 25^2=25\times25=625$

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