So, when doing this, you will first subtract your $40, leaving you with $18. Now take $18 and divide it by $0.15, giving you 120. He spent 120 minutes.
Answer:
1,000 defects
Step-by-step explanation:
Find how many defects that should be made by finding 1% of 100,000:
100,000(0.01)
= 1000
So, there should be 1,000 defects
Answer:
½ - sqrt(3)
Step-by-step explanation:
cos(60) = ½
tan(30) = 1/sqrt(3)
cot(30) = sqrt(3)
tan(90) is undefined
cot(90) = 0
½ - sqrt(3) -0
½ - sqrt(3)
We know that:
is an equation of a circle.
When we substitute x and y (from the pairs we have), we'll get a system of equations:
and all we have to do is solve it for a, b and r.
There will be:
From equations (II) and (III) we have:
and from (I) and (II):
Now we can easly calculate a and b:
Finally we calculate
:
And the equation of the circle is: