4) How many license plates can be made using one letter

followed by 5 digits from 0 through 9?

2,600,000

Step-by-step explanation:

To determine the number of license plate that can be made with one letter and 5 digits;

Number of English alphabet = 26

Number of digits from 0 to 9 = 10

Each letter have 26 possible options and each digit have 10 possible options.

Number of license plate that can be made is;

N = 26 * 10^5

N = 2600000