Answer:1. 4x^2-3x-6
2. 4x^2+7x-8
3. Is the same problem as #2
Step-by-step explanation:
1st guy minus the 2nd is how far the 2nd made it
86-22=64 ft
The answer is D. 30 because you multiple 15 times 2
AB=CD (given)
AB=AM+DM (M is mied point of AB&CD
CD can be writen as AM+DM)
Answer:
We need at least 217 compact fluorescent light bulbs
Step-by-step explanation:
We have that to find our
level, that is the subtraction of 1 by the confidence interval divided by 2. So:

Now, we have to find z in the Ztable as such z has a pvalue of
.
So it is z with a pvalue of
, so 
Now, find M as such

In which
is the standard deviation of the population and n is the size of the sample.
How many compact fluorescent light bulbs need to be selected?
We need at least n bulbs, in which n is found when 
So







We need at least 217 compact fluorescent light bulbs