108 identical books have a mass of 30 kg. Find the mass of 150 such books
the number of such books that have mass of 20 kg

Agc and bgd are vertical angles

Yes. there is a constant ratio of number of calories to gram of protein.12/3=24/4=32/8=44/11=4

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since the cosine is the ratio of the adjacent side to the hypotenuse, you can see that cos 60° = ½. answer. according to the property of cofunctions (topic 3), sin 30° is equal to cos 60°. sin 30° = ½.