Answer:
Step-by-step explanation:
Simplify the expression
Answer:
1. g. Newton 2. e. projectile motion 3. a. gravity 4. f. Albert Einstein 5. d. weight 6. d. orbit 7. b. Isaac Newton
Step-by-step explanation:
can only be written as 
or as 
. One has the multiplication sign the other does not, which is why we put it together, because we know that if they are together they will be multiplied.
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Answer:
Option D
Step-by-step explanation:
The questions which involve calculating the angles and the sides of a triangle either require the sine rule or the cosine rule. In this question, the two sides that are given are adjacent to each other the given angle is the included angle. This means that the angle B is formed by the intersection of the lines a and c. Therefore, cosine rule will be used to calculate the length of b. The cosine rule is:
b^2 = a^2 + c^2 - 2*a*c*cos(B).
The question specifies that c=71, B=123°, and a=65. Plugging in the values:
b^2 = 65^2 + 71^2 - 2(65)(71)*cos(123°).
Simplifying gives:
b^2 = 14293.0182932.
Taking square root on the both sides gives b = 119.6 (rounded to the one decimal place).
This means that the Option D is the correct choice!!!
