How much greater is

(14) What is the value of $\frac{\left(15^4\right)^2}{15^8}$  ?

(15) Determine if the following equation is true or false:
 $\frac{\left(a^9\right)^1}{a^4}=\frac{a^8\times a^1}{a^4}$  

(16) Which is greater: $4^{-2}$  or  $2^{-4}$  . How do you know?

Find the value of x to make the following equation true: $\frac{n^{10}}{n^{12}}=\left(n^x\right)^1$  

Explain the difference between  $\left(-12\right)^2$  and  $-12^2$  .

Evaluate $\left(\frac{2}{3}\right)^2$  

Evaluate $-5^3$  .

Find both square roots of 196.

Evaluate $^3\sqrt{64}$  

Evaluate $^3\sqrt{\frac{125}{216}}$  

Willa purchased a vase for her kitchen that is shaped like a cube and will hold 343 cubic inches of water. What are the dimensions (length, width, and height) of the vase?

(26) In the middle of the park there is a fenced off area, and the shape of the fence is a square. If the area of the fenced off portion is 225 square yards, what is the perimeter of the fence?

(30) A marine biologist discovered species with a diameter of 0.00085 inches. Express this measurement using scientific notation.

(31) Frankie entered a sweepstakes to win a grand prize 0f $10,500,000,000. Express this amount using scientific notation.

(32) Which of the following is a correct representation of 0.000005?

(33) Which if the following has a value that is greater than 10,000 but less than 100,000?

(34) Write the answer in Scientific Notation and in Standard Form.

(8.45 x 10⁶) - 1,200,000

(35) Write the answer in Scientific Notation and in Standard Form.

.000033 + (5 x 10^-5)

(36) After Becca's half-marathon, her pedometer showed 23,580 steps, while Alex recorded 2.42 x $10^4$ steps after the same race. What is the combined amount of their steps?