In order to do this, you need to use the equation:
distance=rate x time
So if you want to find out how long it will take you plug 63 miles into the equation.
63 miles=Rate x Time
You want to find out how long so you need the rate.
You can find the rate from the first sentence.
21miles=Rate X 4 hours
Rate=21/4 miles per hour
Plug this into the original equation.
63=(21/4)(time)
Time=12 hours
Answer:
f(4) = 15 * 1.4^4 = 57.624 inches²
Answer:
A sample size of 1380 should be obtained.
Step-by-step explanation:
Minimum sample size:
The minimum sample size is of:

In which z is the critical value, related to the confidence level, E is the desired margin of error,
and
are the proportions.
99% confidence level
So
, z is the value of Z that has a pvalue of
, so
.
Estimates of 22.6% male and 18.1% female from a previous year
This means that
.
Within 3 percentage points, minimum sample size:
This is n for which
. So



Rounding up:
A sample size of 1380 should be obtained.