Answer: √90=3√5⋅2=3√10
Step-by-step explanation:
Step-by-step explanation:

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Answer:
(b) √55
Step-by-step explanation:
The right triangles in this geometry are all similar, so the ratio of long side to short side is the same:
y/5 = 11/y
y² = 55 . . . . . . multiply by 5y
y = √55 . . . . . take the square root
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And x=4√5 by looking at ratios of short side to hypotenuse.
Answer:
always
Step-by-step explanation:
Answer:
1000 meters below sea level
Step-by-step explanation:
Since the submarine dives at a depth of 4 times 200 meters, then it dives 800 meters.
Sso the submarine now is at 200 meters + 800 meters =1000 meters below sea level.