Answer:
42
Step-by-step explanation:
Since Becky already ran 23 miles, and there is 1 mile per track practice, you add the 19 and 23 to get your answer.
(4x10Power of 3
4x 10=40
40x40x40=64,000
3x10 power of 4
3x10=30
30x30x30x30=810,000
64,000x810,000=51,840,000,000
