Answer:
95
Step-by-step explanation:
If the mean is 400 and the standard deviation 12.5. It means that a range between 375 and 425 is the mean +- 2 standard deviations
400 - 12.5*2 = 375
400 + 12.5*2 = 425
Which means the probability is 95%
When you are looking for +- 1 deviation standard the probability is 68, and for +- 3 the probability is 99.7
There is a more complex explanation based on Z, but assuming you are only applying 68-95-99.7 rule this should be enough.
Answer:
1080°
Step-by-step explanation:
(n - 2) x 180
n = number of sides = 8
(8 - 2) × 180 = 1080°
Answer:
try 8
Step-by-step explanation:
Answer:
1) 5
2) 9
Step-by-step explanation:
n2 - m
= -2(2) - (-9)
= -4 + 9
= 5
in - m2
= i(-2) - (-9)(2)
= -2i + 18
=> -2i = -18
=> i = -18/-2
=> i = 9
Answer:
Step-by-step explanation:
Sum of angles 7 and 8 is 180° as they are supplementary
Angles 7 and 3 are corresponding angles and they measure same as per property of corresponding angles, therefore:
- m∠3 = m∠7
- m∠7 = 180° - m∠8 = 180° - 108° = 72°
- So m∠3 = 72°
Option D is correct
