Answer:
z=1.96
Step-by-step explanation:
Using normal distribution table or technology, 97.5% corresponds to z=1.959964, generally denoted z=1.96, or 1.96 standard deviations above the mean.
(above value obtained from R)
Answer:
119°
Step-by-step explanation:
51+180-112= 119°
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Consecutive terms in an arithmetic sequence differ by a constant

. So



Denote the

-th term in the sequence by

. Now that

, we have

which means
Answer:
264
Step-by-step explanation:
the perimeter of a square with sides of 61+5 is 264
Looking at the choices i believe you need a g in your question. If it is 4g+2
Then you factor out at 2 to get 2(2g+1) choice a
If it 4+2g then you also factor out a 2 but this time get 2(2+g) choice b
Depending on what the question actually is those would be the answers