Compute using the rules for the order of operations. If an expression is undefined, state this.

$$\left|2^2-7\right|^3+4$$

Convert to scientific notation.

$$0.0000013$$

Solve. $V=l w h$, for $h$ (a volume formula)

Simplify.

$$4 t-(3 t-1)$$

A $205$-ft long escalator at the CNN World Headquarters in Atlanta, Georgia, is the world's longest freestanding escalator. In a rush, Dominik walks up the escalator at a rate of $100 \mathrm{ft} / \mathrm{min}$ while the escalator is moving up at a rate of $105 \mathrm{ft} / \mathrm{min}$. How long will it take him to reach the top of the escalator?

Find whether the two equations in the pair are equivalent. $12-x=3$ and $2 x=20$

Find the absolute value.

$$|7|$$

Use mathematical symbols to translate the phrase. Twice a number

Use a commutative law to write an expression equivalent to $3+x$.

Name the set consisting of the first five odd natural numbers using both roster notation and set-builder notation.

Compute using the rules for the order of operations. If an expression is undefined, state this.

$$\dfrac{(2-3)^3-5|2-4|}{7-2 \cdot 5^2}$$

Simplify. Suppose that all variables represent nonzero integers.

$$\dfrac{3^{q+3}-3^2\left(3^q\right)}{3\left(3^{q+4}\right)}$$

Simplify. Suppose that all variables represent nonzero integers.

$$\dfrac{4 x^{2 a+3} y^{2 b-1}}{2 x^{a+1} y^{b+1}}$$

Compute using the rules for the order of operations. If an expression is undefined, state this.

$$\dfrac{4^3-(7-4)^2}{3^2-7}$$