Answer:
40 meters²
Step-by-step explanation:
Formula for the area of a triangle is
The area of the triangle is 40 m²
Find the circumference and area of each circle. Include the formula thank you
2 answers:
Answer:
Circumference: 50.27 cm
Area: 201.06 cm²
Step-by-step explanation:
Hi there!
<u>1) Determine the circumference</u>
where d is the diameter of the circle
Plug in the diameter (16 cm)
Therefore, the circumference is 50.27 cm when rounded to the nearest hundredth.
<u>2) Determine the area</u>
where r is the radius
Plug in the radius (16/2=8)
Therefore, the area of the circle is 201.06 cm² when rounded to the nearest hundredth.
I hope this helps!
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The answer you want is b^2/c^4 in the answer box.
If this is wrong and you have choices, please list them and I will edit or put the answer in a comment.
Answer:
a) (17.227, 22.773)
b) 2.773
c) 2.773
Step-by-step explanation:
Given:
Sample size, n = 25
Standard deviation, s = 4
Sample mean, x' = 20
Level of significance, a = 0.98 = 1 - 0.98 = 0.02
The degrees of freedom, df, for a t-distribution = n - 1 = 25 - 1 = 24
Using the t table, the Critical value =
Margin of error, E =
Limits of 98% confidence interval, we have:
Lower limit : x' - M.E = 20 - 2.773 = 17.227
Upper limit: x' + M.E = 20 + 2.773 = 22.773
Therefore, (17.227, 22.773) is 98% confidence interval.
b) Let's the margin of error by taking half the length of the confidence interval.
Since we are to use half the length of CI, we have:
c)