Answer:
2.5 hours
Step-by-step explanation:
We are given that
Original height of candle=5 in
Every hour candle loses =8% of 5 in=0.4
According to question

Subtract 4 from both sides we get




Divide by 0.4 on both sides


x=2.5 hours
Until the candle has been burning for at least 2.5 hours, the height of her candle will be more than four inches.
Well you would have to use the formula x= -b/2a to find the value of x and then substitute that value of x in the equation to find y<span />
we have that

using a graph tool
see the attached figure
statements
case a) The domain is {x|x ≤ –2}-------> Is False
the domain is all real numbers---------> the interval (-∞,∞)
case b) The range is {y|y ≤ 6}.------> Is True
The range is the interval (-∞,6]
case c) The function is increasing over the interval (–∞ , –2).-----> Is True
See the attached figure
case d)The function is decreasing over the interval (−4, ∞).-----> Is False
In the interval (-4,-2) the function is increasing and in the interval (-2,∞) the function is decreasing (See the attached figure)
case e)The function has a positive y-intercept.------> Is True
The value of y-intercept is 
The answer is D. 877 + 228 + 34 + 104