Answer:
Failed to Reject Null Hypothesis
Step-by-step explanation:
Null Hypothesis: The means from two respective diets are the same Alternative Hypothesis: The two means from the two diets differ.
Fall in Cholesterol (mg/dL)
Diet n Mean SD
Rice 7 14.4 7.8
Vegetable 9 12.19 7.86
If the square is 15 units on each side, then its diagonal would be √(15²)+(15)²=√450=15√2 ☺☺☺☺
Hi there!

We are given:
cos(7x)cos(4x) = -1 - sin(7x)sin(4x)
Begin by moving all terms with variables to one side:
cos(7x)cos(4x) + sin(7x)sin(4x) = -1
The corresponding trig identity is cos(A - B). Thus:
cos(7x - 4x) = cos(7x)cos(4x) + sin(7x)sin(4x) = -1
cos(3x) = -1
cos = -1 at π, so:
3x = π
x = π/3
We can also find another solution. Let 3π = -1:
3x = 3π
x = π
Thus, solutions on [0, 2π) are π/3 and π.
D. 1/5
Reason: it’s always the first number in the equation