Answer:
31
Step-by-step explanation:
Following PEMDAS: Do the division first followed by the subtraction.

Answer:D
Step-by-step explanation:
Answer:
m<C I believe is 25 degrees
Step-by-step explanation:
I’ve attached a photo with my work ....
Hope it helps!!
Answer:
The value of the sample mean resonance frequency is 112Hz
Step-by-step explanation:
A confidence interval has two bounds, a lower bound and an upper bound.
A confidence interval is symmetric, which means that the point estimate used is the mid point between these two bounds, that is, the mean of the two bounds.
In this problem, we have that:
Lower bound: 111.6
Upper bound: 112.4
Sample mean: (111.6 + 112.4)/2 = 112Hz
The value of the sample mean resonance frequency is 112Hz