50.27yd²
Using the formulasA<span>=</span><span>π</span><span>rto the second power</span>d<span>=</span><span>2</span><span>r</span>Solving forAA=14πd2=14·π·82≈50.26548yd²
M is equal to 6 because 6 times 2 would equal 12
Answer:
Answer is c
Step-by-step explanation:
In hypothesis testing whether to accept or reject null hypothesis, normally we find one method as using confidence interval. If the test statistic lies within confidence interval, we accept otherwise we reject.
For arriving confidence intervals we add and subtract margin of error from the mean we use in null hypothesis.
Margin of error = std error * critical value of test (Z or t etc)
For the same std deviation, std error = std dev/sq rt of sample size
Thus std error is inversely proportional to the square root of sample size.
If n becomes larger, std error becomes smaller and vice versa.
So margin of error increases for smaller sample size.
Since we have to select confidence level from a small sample, we have to select one which has the greatest margin of error=18
Hence answer is
c) 71%(+/-18%)
4y + 3 > 23 subtract 3 from both sides
4y > 20 divide both sides by 4
y > 5
-2y > -2 divide both sides by -2 (the order changes)
y < 1
(-oo, 1) ∪ (5, oo)
Answer:
x=23
Step-by-step explanation:
The two angles are equal so you can set 8x-77 and 3x+38 equal to each other and write it as:
8x-77=3x+38
Then you get like terms on the same sides by subtracting 3x from both sides and getting:
5x-77=38
Then you add 77 to both sides and get:
5x=115
Then you divide both sides by 5 and get x=23
