Please tell me fast 3(2.6x-3)=4(-7-2.8x)
1 answer:
You might be interested in
Answer:
0.8239 is the population proportion of participants that tried quitting smoking.
Step-by-step explanation:
We are given the following in the question:
Sample size, n = 142
Participants that tried quitting smoking = 117
Parameter:
- A parameter is a numerical value that describes a population.
Population proportion can be calculated as:
0.8239 is the population proportion of participants that tried quitting smoking.
Answer:
The ball will be at 100 feet at time x=0.5 sec and at time x=7.5 sec
Step-by-step explanation:
<u><em>The correct question is</em></u>
A ball is launched upward from a height 40 feet above ground level. the ball's height at t seconds is given by h(t)=-16t^2+128t+40 At what time(s) will the ball be at 100 feet?
we have
so
For h(t)=100 ft
substitute in the equation and solve for x
The formula to solve a quadratic equation of the form
is equal to
in this problem we have
so
substitute in the formula
therefore
The ball will be at 100 feet at time x=0.5 sec and at time x=7.5 sec