Scientific Notation and Evaluating Expressions Review

The population of City A is 6x10⁸. How many times larger is City A than City B if City B has a population of 1.5x10⁶?

In scientific notation, when you move the decimal to the right, the power of 10 decreases by 1.

What is the sum of 9.73x10⁸ and 4.28x10⁷ in scientific notation?

An expression is shown

(1.621x10^-8) - (8.37x10^-10)

Which value is equivalent to the given expression?

There are about 2.0x10¹¹ stars in the galaxy. There are about 8.0x10¹⁰ galaxies in the universe. How many visible stars are there in the universe?

Which of the following expressions would be equivalent to the expression below

$$\frac{\left(2.4\times10^8\right)}{\left(9.6\times10^5\right)}$$

Find the value of the expression below

$$\left(\frac{1}{5}\right)^2\cdot\left(\sqrt[]{36}+4\right)$$

Select all the expressions that are equivalent to the expression below

$$\left(7^2+\sqrt[]{25}\right)-3.75$$

Lily wants to buy a mirror to hang in her bedroom. The mirror measures 54 inches (in.) across the diagnol and has a width of 43.8 in. Lily uses the expression shown to find the height of the space she needs to hang the mirror so there is at least 7 inches above and below the mirror.

$$\sqrt[]{54^2-43.8^2}+2\left(7\right)$$

What is the height of the space Lily needs. Round your answer to the nearest hundredth.