The correct answer is the first one
Answer:
Step-by-step explanation:
GIVEN: The weight, in pounds, of a newborn baby months after birth can be modeled by the function .
TO FIND: What is the y-intercept of the function and what is its interpretation in the context of the problem.
SOLUTION:
in
if
Hence y-intercept is
the y-intercept in this represents the weight of baby just after he is born.
Answer:
Option B (35°).
Step-by-step explanation:
To solve this question, the trigonometric identity sin x = cos (90-x) is required. It can also be written as cos x = sin (90-x). It can be seen that this identity holds when the two angles are complementary i.e. they sum up to 90 degrees. Therefore, the answer can be determined by substituting all the options one by one in the identity cos x = sin (20+x). If x=30 degrees, then x+20=50 degrees. 30 and 50 are not complementary. If x=35 degrees, then x+20=55 degrees. 35 and 55 are complementary since their sum is 90 degrees. Therefore, B is the correct choice!!!