Answer:
CB = 5, 
Step-by-step explanation:
Assuming that the marks next to angle D mean that 
, then there is enough information to conclude that the two right triangles are congruent (HA theorem--hypotenuse/angle).
Then all the corresponding parts of the two triangles are congruent, including segments BA and BC, making them the same length.
4x + 1 = 9x - 4
Solving for x,
1 = 5x - 4
5 = 5x
1 = x
Pluggint x = 1 into the two expressions reveals that the length of segment CB is 5.
The two small angles at D are congruent, so 
.
I believe the answer is D. Divide 37 by four and you get 9 remainder 1. I equals one.
Hope this helps mate.
Just remember that i to the fourth power is i.
Answer:
Step-by-step explanation:
Given
Probability that an inspector doe not identify low-quality timber=0.20
(a)Probability that both inspector do not identify a low quality timber
(b)Let n be the no of inspector
Probability should be less than 1%=0.01
so 
Taking 
both sides
x>2.861
thus minimum value of x is 3
(c)From part b it is clear that minimum 3 officer are required to to keep the low quality timber below 1%
on an average 2 officer are not sufficient to identify 4 low quality timber out of 100
Answer:
Step-by-step explanation:
We have been given a circle D. Secant BE and CF intersect at point A inside D. We are asked to find the measure of arc BF.
We know that when two secants intersect inside a circle, then the measure of angle formed is half the sum of intercepting arcs.
We know that degree measure of circumference of circle is 360 degrees, so we can set an equation as:
Therefore, the measure of arc BF is 80 degrees.
Divide both sides by f then cancel out
