Answer:
Time t = 1.39 seconds
Step-by-step explanation:
Given;
Initial velocity v = 20 ft/sec
height equation;
h = -16t^2 + 20t + 6
How long does it take for the disc to be caught 3 feet off the ground;
At this point h = 3
Substituting h = 3 into the height equation;
3 = -16t^2 + 20t + 6
-16t^2 + 20t + 6 - 3 = 0
-16t^2 + 20t + 3 = 0
Solving the quadratic equation;
t = 1.39 or t = -0.14
Since t cannot be negative;
Time t = 1.39 seconds
Your answer is 178.75
97.5-(-81.25)
you want to apply the keep change change rule
97.5+81.25 = 178.75
Answer:
And we can find this probability with the complement rule:
And we can use excel or the normal standard table and we got:
So then we expect about 81.8% of students that will be promoted
Step-by-step explanation:
Let X the random variable that represent the scores of promotion of a population, and for this case we know the distribution for X is given by:
Where and
We want to find the following probability:
And we can use the z score formula given by:
Using the z score formula we got:
And we can find this probability with the complement rule:
And we can use excel or the normal standard table and we got:
So then we expect about 81.8% of students that will be promoted
1) m=2
B=8
Y=2x+8
2) the slop is 2
3)the slope is 0
4)the slop is -4/3
Answer:
Step-by-step explanation:
The route makes a right triangle with legs 3 mi and 4 mi, and the hypotenuse of x mi.
<u>Use Pythagorean to find the distance:</u>
- x =
- x =
- x = 5 miles