Answer:
The store can be 90% confident that the interval from 0.293 to 0.355 captures the proportion of all customers of this store who have moved in the past 5 years.
Step-by-step explanation:
The confidence interval provides a range of values (lower and upper bound) based on a certain confidence level at which the true proportion or mean value of a given sample mean or proportion exists. In the scenario above, the confidence level is 90% and the confidence interval is 0.293 to 0.355. Hence, we can be 90% confident that the true proportion of all customers of the store who have moved within the last five years exists within this interval.
Answer:
(i) The equivalent coordinates in rectangular form are
.
(ii) The equivalent coordinates in rectangular form are
.
Step-by-step explanation:
In this exercise we must find the equivalent coordinates in rectangular form from polar form. That is:

Where:
- Norm of vector, dimensionless.
- Direction of vector with respect to +x semiaxis, measured in sexagesimal degrees.
(i) (
,
)


The equivalent coordinates in rectangular form are
.
(ii) (
,
)


The equivalent coordinates in rectangular form are
.
Answer:
What!??!
Step-by-step explanation:
7b + 15 ??
or
7b x 15