This is experimental probability.
If 12 were found to be defective out of 280 the experimental probability of a purifier being defective is:
12/280 which is:
4.3% (to nearest tenth of a percent)
The answer would be 5
-2+7=5
-2+7 is like 7-2
Answer:
Option B.
Step-by-step explanation:
We need to find the circle that has a central angle that measures 40°.
In all options, the center of circle is U. It means central angle must be on center, i.e., U.
In option A,the angle VXZ is at point X which is not the center. So, angle VXZ is not a central angle.
In option B,the angle VUZ is at point U which is the center. So, angle VUZ is a central angle with measure 40°.
In option C,the angle XZV is at point Z which is not the center. So, angle XZV is not a central angle.
In option D,the angle VXZ is at point X which is not the center. So, angle VXZ is not a central angle.
Therefore, the correct option is B.
Let:
the ladder length = l
the distance from the wall and the ladder = x
cos (39) = x / l
x = l * cos (39) = 14 * cos (39) = 10.88 ft
Hope that helps
