4
2² simplified means 2 times 2 (2 times itself) so
2² = 4
2×2=4
2²=4
Now , it doesn't make any difference with a number like 2 .
Suppose we had 3 :
3² = 9
3² is not the same as 3 ×2 , and here's the reason for that :
3²=3×3=9
3 × 2 = 6
420 miles in 7 hours is the same as 60 miles per hour !
Answer:
1 hour
Step-by-step explanation:
it depends on speed of light
Answer:
5
Step-by-step explanation: