Express
1 answer:
Answer:
Step-by-step explanation:
The solution is in the picture
At line 7, the denominator of the expression contains irrational number (which is surd 10). This shows that the expression is not simplified
At line 8 of my solution, multiply both numerator and denominator by the conjugate of
which is
in order to eliminate irrational number at denominator
More info of conjugate
The conjugate of a+b is a-b,
Why conjugate? Try it yourself!
Hint: (a+b)(a-b) = a^2 - b^2
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Answer:
d = 6.246 m
Step-by-step explanation:
Given that,
The distance around a circular pool is 39.25 m.
We need to find how does the lifeguard have to walk from the edge of the pool to the centre of the pool. It means we need to find the radius r of the circle.
ATQ,
Circumference = 2πr = 39.25 m
r is radius
So, the required distance is 6.246 m.