Answer:
Step-by-step explanation:
The formula for the circumference of a circle in terms of diameter is ...
C = πd
Then the diameter is ...
d = C/π
If we use π ≈ 22/7 and C = 66 ft, then we find the diameter to be ...
d = (66 ft)/(22/7) = (66 ft)(7/22) = 21 ft
The diameter of the pool is about 21 feet.
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Since Carlos needs 4 more feet of rope, he will want to buy 25 feet of rope for a cost of ...
(25 ft)($0.45 /ft) = $11.25
Carlos will pay $11.25 for the rope.
To add or subtract fractions, you must find the common denominator. To do this, you must find a factor that is common between the two denominators, in this case its 3 because 4x3=12. So multiple 1/4 by 3 and you should get 3/12. Then simply add and subtract the numerators, so +- is essentially just subtraction so to simplify the equation, it would be 3/12-3/12-5/12. So 3/12-3/12= 0, 0-5/12= -5/12. So the answer is -5/12.
Hope this helps!
Answer:
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Step-by-step explanation:
Given:
The number is .
To find:
The a+bi form of given number.
Solution:
We have,
It can be written as
Here, real part is missing. So, it can be taken as 0.
So, a = 0 and .
Therefore, the a+bi form of given number is .
Solution :
Given :
So we want to test :
vs
a). For 98% confidence interval :
= (1.956, 10.045)