Answer:
After 2.5 seconds.
Step-by-step explanation:
The function represents the height of the ball. So when it hits the ground, the height of the ball is 0. You set h = 0 and solve for t. Once you do that, you get t = -4, 2.5. However, time can't be negative so only 2.5 seconds is an answer
So 7x+19 has to be greater then or equal to 21
Subtract 19 from both sides to get 7x >_ 2
so × has to be greater than or equal to 2/7
Answer:
slope of CD = - 3
Step-by-step explanation:
Parallel lines have equal slopes
Given slope of AB is - 3 then slope of CD is - 3
Subtract 7 on both side
Divide 3 from both sides
X should be >= to 1
Subtract 9 from both sides
Divide -4 from both sides
X should be =< 2
Answer:
Step-by-step explanation:
We can write this rate as an ordinary differential equation.
Where a is proportional constant, P the population variable, and t the time.
Integrating each side of the equation.
To find C we need to use the initial condiction, it means evaluae P at t=0.
Now, we use the sentence the population has doubled in 5 years.
We can find "a" in this condition.
Finally, let's find how long will it take to triple.
I hope it helps you!