Step-by-step explanation:
the answer is 54 cm
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Answer:
they're similar to visible light except their wave length is much shorter, causing them to be invisible to the naked eye
4 fiction to 1 nonfiction
(4 x 7 = 28) fiction to (1 x 7 = 7) nonfiction
Therefore, the required ratio is 28 to 7
Add the total purchase then subtract the used amount from it. U'll get 2 1/3.
Y=42 Y=?
X=6 X=3
cross multiply
so 42times3=6timesY
126=6Y
Y=126 divided by 6
=21