Answer: Someone who walks 60 feet in ten seconds
Explaination: if you walk 25 feet per 5 seconds you would be walking 50 feet per 10 seconds
Answer:
The value of the given expression is -878.08.
Step-by-step explanation:
Here, the given question is INCOMPLETE.
The complete question is:
Evaluate the expression for a = 4, b = -5, and c = -7. 
Here, substitute the vale of a = 4, b = -5 and c = -7, we get:

Hence, the value of the given expression is -878.08.
Answer:

Step-by-step explanation:
Given: 
To find: Values of the function F(3)
, F(−12)
,
, 
Solution:
A function is a relation in which each and every element of the domain has a unique image in the co-domain.
To find the values of the functions
, put
in the given function 




Answer:


And using a calculator, excel ir the normal standard table we have that:

And we can calculate the probability like this:
Step-by-step explanation:
A random sample of 36 observations has been drawn from a normal distribution with mean 50 and standard deviation 12. Find the probability that the sample mean is in the interval 47<=X<53. Is the assumption of normality important. Why?
Previous concepts
Normal distribution, is a "probability distribution that is symmetric about the mean, showing that data near the mean are more frequent in occurrence than data far from the mean".
The Z-score is "a numerical measurement used in statistics of a value's relationship to the mean (average) of a group of values, measured in terms of standard deviations from the mean".
Solution to the problem
Let X the random variable that represent the variable of interest of a population, and for this case we know the distribution for X is given by:
Where
and 
Since the distribution for X is normal then we know that the distribution for the sample mean
is given by:

We can find the probability required like this:


And using a calculator, excel ir the normal standard table we have that:

And we can calculate the probability like this:

Answer:
Triangle
Step-by-step explanation:
all of them have parallel sides except triangle