What is the surface area of the solid? А. 520 square inches

B. 660 square inches

C. 260 square inches

D. 470 square inches

A. 520 square inches is your surface area of the rectangular prism

Question:

There are 25 students in the class. Ten students have a sports practice after school. What is the ratio of students that do have practice, to those that do not?

Ratio of students that do have practice, to those that do not is 2 : 3

Solution:

Total number of students = 25

Students those practice sports = 10

Therefore,

Student who do not have sports practice = 25 - 10 = 15

The required ratio is given as:

Ratio = Students those practice sports : Student who do not have sports practice

Ratio = 10 : 15

Reduce the ratio to lowest term by dividing by5

Ratio = 2 : 3

Thus ratio of students that do have practice, to those that do not is 2 : 3

Question:

A table measures 3 feet across. How many inches is this?

The table measure in inches is 36 inches

Solution:

Table measure in feet = 3 feet

We have to convert 3 feet to inches

Use the conversion factor

1 feet = 12 inches

Therefore, 3 feet = 3 x 12 inches = 36 inches

Thus the table measure in inches is 36 inches

Question:

If every pound is sixteen ounces, how many ounces does a two-pound textbook weight?

The weight of 2 pound book in ounce is 32 ounces

Solution:

Given that, Every pound is sixteen ounces

Therefore, we say,

1 pound = 16 ounce

We have to find weight of 2 pound book in ounce

Convert 2 pound to ounce

2 pound = 2 x 16 ounces = 32 ounces

Thus weight of 2 pound book in ounce is 32 ounces