The Russian ruble coin has a radius of 10.25 mm. What is the circumference in terms of Pi?
2 answers:
You might be interested in
Answer:
x ≈ 66.73
Step-by-step explanation:
Using the tangent ratio in the right triangle
tan27° = =
=
( multiply both sides by x )
x × tan27° = 34 ( divide both sides by tan27° )
x = ≈ 66.73 ( to 2 dec. places )
Answer:
The 95% confidence interval is "87.94, 91.86".
Step-by-step explanation:
The given values are:
Sample batches,
n = 25
Sample mean concentration,
= 89.9 mg
Amount of chemical,
σ = 5
α = 0.05
The critical value from Z table will be:
=
=
=
Now,
The confidence interval will be:
=
On substituting the values, we get
=
=
=
Lower limit will be:
=
=
Upper limit will be:
=
=