How does a number that names a year look different for a four digit number in standard form?

An equation where variables are used to represent known values—function notation true or false

Answer this question i need as soon as possible

Technicians have installed a center pivot, circular irrigator for a farm that covers 25 acres. a.) how long is the irrigation boom (in feet) from the center pivot to its farthest extent? b.) if the irrigation boom makes 4 full revolutions in a day, how many miles does the end of the boom travel in 5 days?