Malika bought 7 new pairs of shoes. Each pair of shoes cost the same amount and was discounted by $21.75.
1 answer:
You might be interested in
The quadratic is continuous over its entire domain, which is to say we can evaluate the limit by direct substitution:
You are mistaking (-3)² for -3². They are not the same number.
(-3)² = (-1 × 3)² = (-1)² × 3² = 1 × 9 = 9
-3² = -1 × 3² = -1 × 9 = -9
Given:
Consider the below figure attached with this question.
To find:
The measure of angle r by using the cosine rule.
Solution:
According to Law of Cosine,
Using the Law of Cosine, we get
On further simplification, we get
Therefore, the measure of angle r is 106.78 degrees.
Answer:
z-interval: (-1.64, 1.64)
90% Confidence interval: (7954,8446)
Step-by-step explanation:
We are given the following in the question:
Sample mean, = $8,200
Sample size, n = 225
Alpha, α = 0.10
Sample standard deviation, s = $750
90% Confidence interval:
Putting the values, we get,
z-interval: (-1.64, 1.64)
(7954,8446) is the required confidence interval.
