Answer:
22.21 m/s
Step-by-step explanation:
1 hour = 80km
1 minute = 80000 ÷ 60 = 1.333km
1 second = 1.333 ÷ 60 = 22.21
20a³
Simply multiply:
-5(-4) = 20
-a(-a)(a) = a²(a) = a³