You need to use foil here (first, outer, inner, last).
gxg=g^2
gx2=2g
7xg=7g
7x2=14
g^2-2g-7g+14 then simplify g^2-9g+14 is the answer
Answer: 4 hours
Step-by-step explanation: you have to divide 240 by 60 which is 4
If this is too hard for you remember you can divide 24 by 6 and get the same answer hope this helps mark me brainliest if it helped
Answer:
100 Feet of PVC for 135.25
Step-by-step explanation:
If you had 75 feet of PVC and paid 111.50 you would pay 1.48 a foot for each PVC but if you paid 135.25 for 100 feet you would pay 1.35 a foot which in turn would become cheaper.
You just have to look at the table that give you it was angle 31 so then you would go to angle and go across the line to where it says cos then you right the number which would be 0.8572
Answer:
A sample size of at least 531 is required.
Step-by-step explanation:
We are lacking the confidence level to solve this question, so i am going to use a 90% confidence level.
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 the margin of error M as such
In which 
is the standard deviation of the population and n is the size of the sample.
Find the required sample size for the new study.
A sample size of at least n is required.
n is found when 
We have that 
So
Rounding up
A sample size of at least 531 is required.
