Cos60° = 0.5
Any angle less than 90° is an acute angle.
Therefore, 60° is the acute angle.
<h3>
Answer: 85 units ^2</h3>
Step-by-step explanation:
Using the equation 
so 
and 
Let n = required random sample size.
Assume that the population standard deviation is known as σ.
Let m = sample mean.
At the 95% confidence level, the expected range is
(m - k(σ/√n), m + k(σ/√n))
where k = 1.96.
Therefore the error margin is 1.96(σ/√n).
Because the error margin is specified as 3% or 0.03, therefore
(1.96σ)/√n = 0.03
√n = (1.96σ)/0.03
n = 128.05σ²
This means that the sample size is about 128 times the population variance.
Answer:
Smallest sample size = 128.05σ², where σ = population standard deviation.
Answer:
8 yards
Step-by-step explanation:
1 foot = 0.33 yards
(0.33) x (24) = 8
therefore there are 8 yards in 24 feet
