Lesson 2: Practice Problems

Problem 1

Write each expression with a single exponent:

$10^{3} \cdot 10^{9}$
$10 \cdot 10^{4}$
$10^{10} \cdot 10^{7}$
$10^{3} \cdot 10^{3}$
$10^{5} \cdot 10^{12}$
$10^{6} \cdot 10^{6} \cdot 10^{6}$

Problem 2

A large rectangular swimming pool is 1,000 feet long, 100 feet wide, and 10 feet deep. The pool is filled to the top with water.

What is the area of the surface of the water in the pool?
How much water does the pool hold?
Express your answers to the previous two questions as powers of 10.

Problem 3 From Unit 2 Lesson 12

Here is triangle $A B C$ .

Triangle ABC with side lengths 6, 8, and 10 cm.

Triangle $D E F$ is similar to triangle $A B C$ , and the length of $E F$ is 5 cm. What are the lengths of sides $D E$ and $D F$ , in centimeters?

Problem 4

Elena and Jada distribute flyers for different advertising companies. Elena gets paid 65 cents for every 10 flyers she distributes, and Jada gets paid 75 cents for every 12 flyers she distributes.

Draw graphs on the coordinate plane representing the total amount each of them earned, $y$ , after distributing $x$ flyers. Use the graph to decide who got paid more after distributing 14 flyers.

Problem 5

Noah drew a scaled copy of Polygon $P$ and labeled it Polygon $Q$ .

If the area of Polygon $P$ is 5 square units, what scale factor did Noah apply to Polygon $P$ to create Polygon $Q$ ? Explain or show how you know.

Polygon Q on a grid. Polygon Q has 8 sides. Starting at the bottom left corner, the first side is 9 units up, the second side is 6 units right, the third side is 3 units down, the fourth side is3 units left, the fifth side is 3 units down, the sixth side is 3 units right, the seventh side is 3 units down, and the eighth side is 6 units left.

Problem 6 From Unit 6 Lesson 21

A cone has a volume of $36 π$ cm³ and height $h$ . Complete this table for volume of cones with the same radius but different heights.

height (cm)	volume (cm³)
$h$	$36 π$
$2 h$
$5 h$
$\frac{h}{2}$
$\frac{h}{5}$