Answer:
And we can find this probability on this way:
And using the normal standard distribution table or excel and we got:
Step-by-step explanation:
Let X the random variable that represent the length of time student of a population, and for this case we know the distribution for X is given by:
Where 
and 
We are interested on this probability
We can solve the problem using the z score formula given by:
If we apply this formula to our probability we got this:
And we can find this probability on this way:
And using the normal standard distribution table or excel and we got:
Answer:
Option 2.
13/40 miles
Step-by-step explanation:
Tuesday
Pamela ran 7/10 mile = 0.7 miles
Thursday
Pamela ran 3/8 mile = 0.375 miles
If we subtract both quantities we can find how much farther she ran
0.7 miles - 0.375 miles = 0.325 = 13/40 miles
Answer: D
Step-by-step explanation:
We are given X = 15 - 4y so simply replace any and all X's in the first equation with (15 - 4y). Option D is the best because the X is removed and replaced with the proper writing.
Https://us-static.z-dn.net/files/d43/0ec4ed94ec3de3b3509a7a350b90a76f.jpeg
Answer:
x = 85
Step-by-step explanation:
Formula
a^2 + b^2 = c^2
Givens
Solution
- 13^2 + 84^2 = x^2 Substitute the givens into the formula
- 169 + 7056 = x^2 Add the left
- 7225 = x^2 Take the square root of both sides.
- sqrt(7225) = sqrt(x^2)
- x = 85
