Simplify the following.
${}^4\sqrt{{(-x)}^4}$

Estimate the square root between two consecutive whole numbers.

$\sqrt{138}$

Use a calculator to evaluate the following and round to the nearest hundredths.

${}^5\sqrt{75}$

Use a calculator to evaluate the following and round to the nearest hundredths.

${-}^8\sqrt{\frac{45}{29}}$

Simplify the following.

${}^3\sqrt{{(-5)}^3}$

Simplify the following.

${}^4\sqrt{x^4{y}^8}$

Simplify the following.

${}^4\sqrt{{(2-a)}^4}$

Simplify the following.

${}^7\sqrt{{(-x-1)}^7}$

Simplify the following.

${-}^8\sqrt{{(x+1)}^8}$