Answer:
A. 9.7%
Step-by-step explanation:
margin of error:
z * 
n is sample size
z is the z score (for a 95% confidence interval you would use 1.96)
p is the sample proportion
to solve for 'p', remember that if a decimal value is given, use that. but if it is a whole number, then divide that number by the sample size, and substitute it into the formula.
in this case we are given 43% so 0.43.
in the formula :
1.96 * 
if you calculate this you get around 0.09703 this is 9.7%
Answer:
It's elevation at the surface is 0, and the elevation twenty feet below is -20.
Step-by-step explanation:
The surface level is 0, and diving 20 feet under means 0 - 20, which is negative 20, or -20.
300 feet * mile / 5,280 feet =
<span>
<span>
<span>
0.0568181818
</span>
</span>
</span>
miles
2.92 seconds * hour / 3,600 seconds =
<span>
<span>
<span>
0.0008111111
</span>
</span>
</span>
hours
<span>
<span>
0.0568181818
</span>
</span>
miles / <span>
<span>
0.0008111111
</span>
</span>
hours =
<span>
<span>
<span>
70.0498132005
</span>
</span>
</span>
miles per hour
It should be for 5 hours if $30 is what they started with
