Answer:
It goes 18 cm every second:
18 x 4 = 72 cm
The bridge is 72 cm long.
Hope this helps!
Answer:
1) 11498.65 
2) 38.81 
Step-by-step explanation:
amount of water displaced = volume of sphere

To answer your question, the answer would be 8
The principal square root of 49 is just
7 because 7 times 7 is 49.
It can not be -7 because
a principle square root cannot be negative.
