Functions are prewritten formulas. Functions differ from regular formulas in that you supply the value but not the operators, such as +, -, *, or /. For example, you can use the SUM function to add. When using a function, remember the following:
The US Navy no longer has nuclear powered cruisers or destroyers. The only nuclear powered surface ships are aircraft carriers. In general, the nuclear powered cruisers/destroyers could achieve speeds in excess of 30 knots (34 Miles Per Hour). Aircraft carriers must be able to achieve the same speed in order for them to be able to launch and recover aircraft. The US Navy no longer has nuclear powered cruisers or destroyers.
Similarly, the size 285/35ZR19 99Y indicates a maximum speed capability of over 149 mph, while the Y in the service description specifies a maximum speed of 186 mph. The most recent change is to enclose the Y-speed rating indicated in a service description in parentheses, such as 285/35ZR19 (99Y).