# [SOLVED] Integer, constant?

• Mar 31st 2005, 08:52 AM
Suriya
[SOLVED] Integer, constant?
I have a question that asks which of the following is the number 78.5

Integer
Rational
Variable
Constant

Thanks for any help.
• Mar 31st 2005, 03:31 PM
MathGuru
78.5 is . . .
The number 78.5 . . .

is not an Integer because it is not a whole number.

is a Rational number because it can be expressed as the ratio of 2 numbers (157/2)

is not a Variable because it is a defined constant number.

is a Constant because it is defined and unchanging number.

Math Guru
• Apr 9th 2005, 09:26 PM
theprof
Quote:

Originally Posted by Suriya
I have a question that asks which of the following is the number 78.5

Integer
Rational
Variable
Constant

Thanks for any help.

78.5 is a decimal number, and you can transform it in a fraction like:
785/10.

78.5 is a constant because its value doesn't change.

Integers are whole numbers (without decimal point) like -13;35;0;76 and so on.

A variable is something that changes, the temperature of your room, for instance, the speed of a car etc.

bye