Answer:

Step-by-step explanation:
Given
--- candles melted

--- time to melt
Required
The time since the first was lit
If 1 candle melts in 4 hours, 2 candles will melt in 8 hours.
i.e.



For the 3rd candle that has melted, 4 inches
First, calculate the fraction that melt



The time to melt is:



So, the required time is:


Convert to minutes



Answer:
20% and $20,000
Step-by-step explanation:
Answer:
02 High Schools would be selected from the stratum with a percent-free-lunch value of 40 less than or equals x.
Step-by-step explanation:
As the sample size needed is 25 and total schools are 100 so this indicate 1 school in each 4 schools is to be selected. This is given as

Now as the schools with percent free lunch are 8 so now

So only 2 schools will be selected in this regard.