3 km / h every second for 10 seconds = 30 km / hr
90 + 30 = 120 km / hr
Answer:
A
Step-by-step explanation:
The easiest way to simplify the expression below is using a property: if we take random non-0 number to the 0 power, we finally get 1, so
Both are <u>equal</u> to each other.