Answer:
The answer is B
Step-by-step explanation:
General Idea:
Domain of a function means the values of x which will give a DEFINED output for the function.
Applying the concept:
Given that the x represent the time in seconds, f(x) represent the height of food packet.
Time cannot be a negative value, so
The height of the food packet cannot be a negative value, so
We need to replace 
for f(x) in the above inequality to find the domain.
![-15x^2+6000\geq 0 \; \; [Divide \; by\; -15\; on\; both\; sides]\\ \\ \frac{-15x^2}{-15} +\frac{6000}{-15} \leq \frac{0}{-15} \\ \\ x^2-400\leq 0\;[Factoring\;on\;left\;side]\\ \\ (x+200)(x-200)\leq 0](https://tex.z-dn.net/?f=%20-15x%5E2%2B6000%5Cgeq%200%20%5C%3B%20%5C%3B%20%20%5BDivide%20%5C%3B%20by%5C%3B%20-15%5C%3B%20on%5C%3B%20both%5C%3B%20sides%5D%5C%5C%20%5C%5C%20%5Cfrac%7B-15x%5E2%7D%7B-15%7D%20%2B%5Cfrac%7B6000%7D%7B-15%7D%20%5Cleq%20%5Cfrac%7B0%7D%7B-15%7D%20%5C%5C%20%5C%5C%20x%5E2-400%5Cleq%200%5C%3B%5BFactoring%5C%3Bon%5C%3Bleft%5C%3Bside%5D%5C%5C%20%5C%5C%20%28x%2B200%29%28x-200%29%5Cleq%200%20)
The possible solutions of the above inequality are given by the intervals ![(-\infty , -2], [-2,2], [2,\infty )](https://tex.z-dn.net/?f=%20%28-%5Cinfty%20%2C%20-2%5D%2C%20%5B-2%2C2%5D%2C%20%5B2%2C%5Cinfty%20%29%20)
. We need to pick test point from each possible solution interval and check whether that test point make the inequality 
true. Only the test point from the solution interval [-200, 200] make the inequality true.
The values of x which will make the above inequality TRUE is 
But we already know x should be positive, because time cannot be negative.
Conclusion:
Domain of the given function is 
K^10 is the answer you're looking for.
Considering the sum of the internal angles of a triangle, the measures are given as follows:
<h3>What is the sum of the internal angles of a triangle?</h3>
The sum of the internal angles of a triangle is of 180º.
In general terms, the sum of the internal angles of a polygon of n sides is given by:
S = (n - 2) x 180º.
For a triangle, n = 3, hence S = 180º.
For this problem, the three internal angles of the triangle are given as follows:
7x - 4, 4x, 73.
Hence we can solve for x applying the sum as follows:
7x - 4 + 4x + 73 = 180
11x = 111.
x = 10.09.
Hence:
A = 4x = 4 x 10.09 = 40.36º.
B = 7 x 10.09 - 4 = 66.64º.
More can be learned about the sum of the internal angles of a triangle at brainly.com/question/25215131
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So first off you divide 360 visitors by 3 hours this will give you the average amount of visitors per hour 360/3=120 so there are about 120 visitors per hour then you would multiply 120 by 7 to find out the amount of people who would ride the coaster in 7 hours. 120 times 7=840
