Answer:
4^3, 8^2, 2^6
Step-by-step explanation:
64^1 = 64
We need all expressions equal to 64.
4^3 = 4 * 4 * 4 = 64 Yes
3^4 = 3 * 3 * 3 * 3 = 81 No
8^2 = 8 * 8 = 64 Yes
2^8 = 2 * 2 * 2 * 2 * 2 * 2 * 2 * 2 = 256 No
6^2 = 6 * 6 = 36 No
2^6 = 2 * 2 * 2 * 2 * 2 * 2 = 64 Yes
Answer: 240 seconds OR 4 minutes
Step-by-step explanation:
Length of the train = 1 km
Length of the tunnel = 1 km
Therefore, length of the train + length of the tunnel = (1 + 1) km = 2 km
= 2000 m
Speed of the train = 30 km/hr = 8.333 metres per second
Therefore, time taken by the train to cross the tunnel = 2000 m/ 8.333 m/sec.
= 240 seconds = 4 minutes
Answer:
area: 24
lateral area: 36
total area: I am not sure.
volume: 24
Step-by-step explanation:
area: length times width
lateral area: (perimeter of base) times height
total area: I do not know, sorry.
volume: length times width times height.
Answer:
r = 7
Step-by-step explanation:
60 = -24 + 12r
<u>+24 +24</u>
84 = 12r
84 ÷ 12 = r
7 = r
Check:
60 = -24 + 12r
-24 + 12(7)
-24 + 84 = 60
