Answer:
a) Statistic.
b) The population proportion is expected to be between 0.29 and 0.31 with a 94% degree of confidence.
Step-by-step explanation:
a) The proportion of 30% is a statistic, as it is a value that summarizes data only from the sample taken in the study from USA Today. Other samples may yield different proportions.
b) We can use the statistic to estimate a confidence interval for the parameter of the population.
The standard error for the proportion is calculated as:

The margin of error is 0.01. We can use this value to determine the level of confidence that represents.
The formula for the margin of error is:

This z-value, according to the the standard normal distribution, corresponds to a confidence interval of 94%.
The interval for this margin of error is:

Then, we can conclude that the population proportion is expected to be between 0.29 and 0.31 with a 94% degree of confidence.
Answer:32
Step-by-step explanation: 500x4=2000
8 defects times 4 =32
Answer:
Total: $9,789.13
Interest: $3,789.13
Step-by-step explanation:
Answer:
The perimeter of the object is
feet.
Step-by-step explanation:
The perimeter of an object is solved with the formula:
,
where <em>p</em> is the perimeter of the object, <em>l</em> is the length of the object, and <em>w</em> is the width of the object.
Therefore, we want to define the values we have been given:
- 7 feet - length (<em>l </em>)
- 4 2/3 feet - width (<em>w </em>)
We can use these and supply them into the equation to solve for p.

Therefore, the perimeter of the object is
or
feet.
Here is the full question
A rocket is launched from a tower. The height of the rocket, y in feet, is related to the time after launch, x in seconds, by the given equation. Using this equation, find the time that the rocket will hit the ground, to the nearest 100th of second.
Equation:
y=-16x^2+153x+98
Answer:
10.2 seconds
Step-by-step explanation:
Given equation :
shown the expression of a quadratic equation
Let y =0
∴
0 = 
where;

Using the quadratic formula:

replacing it with our values; we have:

OR 
OR 
Hence, we go by the positive value since, is the time that the rocket will hit the ground.
x= 10.17
x = ≅ 10.2 seconds
Therefore, the rocket will hit the ground, to the nearest 100th of second. = 10.2 seconds