The Key on the Calculator Used to Change the Sign

question 43

Multiple Choice

The key on the calculator used to change the sign of a number is called:

• A) Plus/minus key
• B) Negative number key
• C) Reverse key
• D) Subtract key

---

Definitions:

Hydrodynamics

The science of forces acting on, or exerted by, liquids, usually, but not always, in confined circuits.

Hydraulics Principles

Fundamental concepts governing the behavior and operation of hydraulic systems, including fluid dynamics, pressure, and flow control.

Stratosphere

The layer of the Earth's atmosphere located above the troposphere and below the mesosphere, characterized by a gradual increase in temperature with altitude.

Tubular Column

A structural element with a hollow, cylindrical shape, used in construction and engineering for its strength and lightweight properties.