# Lesson 18

Volume and Graphing

### Problem 1

A cube with side length 5 centimeters has a density of 3 grams per cubic centimeter. What is its mass?

### Solution

(From Unit 5, Lesson 17.)

### Problem 2

Rectangular prism $$A$$ measures 5 inches by 5 inches by 6 inches. Rectangular prism $$B$$ measures 2 inches by 4 inches by 6 inches.

1. Before doing any calculations, predict which prism has greater surface area to volume ratio.
2. Calculate the surface area, volume, and surface area to volume ratio for each prism.

### Solution

(From Unit 5, Lesson 16.)

### Problem 3

A right cone has a base with radius 4 units. The volume of the cone is $$16\pi$$ cubic units. What is the length of a segment drawn from the apex to the edge of the circular base?

### Solution

(From Unit 5, Lesson 15.)

### Problem 4

A right pyramid has a square base with sides of length 10 units. Each segment connecting the apex to a midpoint of a side of the base has length 13 units. What is the volume of the pyramid?

A:

1300 cubic units

B:

1200 cubic units

C:

$$\frac{1300}{3}$$ cubic units

D:

400 cubic units

### Solution

(From Unit 5, Lesson 15.)

### Problem 5

A solid can be constructed with 2 squares and 4 congruent, non-rectangular parallelograms. What is the name of this solid?

A:

cube

B:

right rectangular prism

C:

right square prism

D:

oblique square prism

### Solution

(From Unit 5, Lesson 12.)

### Problem 6

Diego is deciding which of 2 juice containers he should buy. One container is in the shape of a cylinder with radius 2.5 centimeters and height 10.5 centimeters. The second container is in the shape of a rectangular prism. The prism also has height 10.5 centimeters. Its length is 4 centimeters and its width is 6 centimeters.

Which juice container has the larger volume?

### Solution

(From Unit 5, Lesson 10.)

### Problem 7

A parallelogram has an area of 1 square centimeter. Write an equation where $$y$$ is the scale factor required for a dilation of the parallelogram to have an area of $$x$$ square units. Sketch a graph representing the equation.

### Solution

(From Unit 5, Lesson 5.)

### Problem 8

Suppose several solids are divided into thin slices, all in the same direction. For each set of slices, decide what kind of solid they came from.

1. a set of similar rectangles, decreasing in size to a single point, ordered from greatest in size to smallest
2. a set of congruent triangles
3. a set of congruent squares
4. a set of circles, decreasing in size to a single point, ordered from greatest in size to smallest

### Solution

(From Unit 5, Lesson 2.)

### Problem 9

Four solids on the list have the same volume. Select these solids.

A:

Solid A

B:

Solid B

C:

Solid C

D:

Solid D

E:

Solid E