A discovery in New Jersey actually contributed to the

Mathematics

1 answer:

Butoxors [25]2 years ago

4 0

Correct option is B. A discovery in New Jersey actually contributed to the

early economic development of America and, in 1714, a worker uncovered a green rock containing copper.

Here, the use of conjunction 'and' is incorrect as it creates a kind of distortion which seems as if we are talking about two different things: rather then linking the two parts of the sentence, 'and' further disconnects it.

"When" seems better than "And". It clearly indicates the mentioned time. Thus B is the correct answer.

To learn more about copper from given link

brainly.com/question/24856041

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In triangle abc angle a = 40◦, side b = 11 and side c = 5. use the cosine rule to find the length of side a, to two decimal plac

Sonbull [250]

A^2 = b^2 + c^2 - 2bc cos a

= 11^2 + 5^2 - 2*5*11 cos 40

= 7.86 to 2 DP's

to find the remaining angles use the sine rule:-
a / sin A = b / sin B so

7.857/ sin 40 = 11 / sin B
sin B = 11 sin40 / 7.857 = 0.8999

<B = 64 degrees

so <C = 180 - 64-40 = 76 degrees

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3 years ago

Select the correct inequality to make a true statement

polet [3.4K]

Step-by-step explanation:

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