The possible key design is 262144.
Algebra is a branch of mathematics that uses mathematical expressions to aid in the representation of problems or situations. In algebra, we use numbers with definite or fixed values, such as 2, -1, 0.5, and so on. In algebra, variables such as x, y, and z are used in addition to numbers.
Given that keys for antique cars had nine parts, with four patterns for each part
We have to determine how many different key designs are possible for these cars
Number of designs possible
= 4x4x4x4x4x4x4x4x4
= 4^9
= 262144
Therefore the possible key design is 262144
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