9514 1404 393
Answer:
7 1/3 hours
Step-by-step explanation:
We are to assume that the total number of heater-hours required is a constant. That is, the time is inversely proportional to the number of heaters.
If the number of heaters goes up by a factor of 6/4 = 3/2, then the number of hours will go down by the inverse factor: 2/3.
With 6 heaters instead of 4, the time required is (2/3)(11 hours) = 7 1/3 hours.
The empirical rule states that approximately 68/95/99.7% of a normal distribution lies within 1/2/3 standard deviations. So the answer is 68%.
Answer:
x = 20
Explanations:
The triangle shown is a right angled triangle
The longest side of the triangle is called the hypotenuse
The side facing the angle is called the opposite
The third side is the adjacent
In this triangle:
Hypotenuse = 52
Opposite = 48
Adjacent = x
Using the Pythagora's theorem
Y = kx as y and x are directly proportional
6 = 10k
k = 0.6
y = 0.6x
18 = 0.6x
x = 30
Since 450 is less than 500 you would leave it at 10,000