Explanation

Explanation

Expanded form is writing a number as the sum of the place values of its digits.

For example, 345 would be written as 300 + 40 + 5 in expanded form.

Explanation

To convert millimeters to centimeters, divide by 10:

0.6 mm ÷ 10 = 0.06 cm.

Explanation

An open sentence contains a variable (like x) and becomes either true or false only when a value is assigned.

x < 3 is open because its truth depends on the value of x.

Explanation

To find the ratio, we need to convert both measurements to the same unit. Let's convert feet to inches (1 foot = 12 inches).

3 feet = 3 * 12 = 36 inches

Now, the ratio is:

36 inches : 16 inches

To simplify, divide both numbers by their greatest common divisor (GCD), which is 4:

36 ÷ 4 = 9

16 ÷ 4 = 4

The simplified ratio is:

9/4