Answer:
Two methods both tell us the ball is at 20 feet height at 0.783 seconds going up and 1.28 seconds on the way down.
Step-by-step explanation:
The question can be answered by either calculation or by graphing.
<u>Calculation:</u>
Set the equation to h = 20 feet and solve with the quadratic equation.
h= 4 + 33t - 16t^2
4 + 33t - 16t^2 = 20
- 16t^2 + 33t + 4 = 20
- 16t^2 + 33t - 16 = 0
I find solutions of 0.779 and 1.28 seconds.
<u>Graphing:</u>
See the attached graph.
The graph shows solutions of 0.783 and 1.28 seconds.
Both methods show the ball to be at 20 feet height at 0.783 seconds going up and 1.28 seconds on the way down.
Answer:
3.5N
Step-by-step explanation:
140g=0.14kg
F=ma
F=0.14×25
F=3.5N
Answer:
The car's speed is 74.5444 mi/hr. It travels 298.2576 miles in 4 hours.
Step-by-step explanation:
If we want to know the speed in mi/hr, we must convert the km to mi. We can convert from kilometers to miles as follows.
mi = km * 0.62137
Then, if the car is moving at 120 km / hr, we have that the car is moving at
120*0.62137 mi /hr, which is 74.5644 mi/hr. If we want to know how many miles the car travels in four hours, we multiply the speed times the total time. Hence
total distance = 74.5444 mi/hr * 4 hr = 298.2576 miles.
Answer:
391
explanation:somehow it is 391. just somehow.
Answer:
(3)(0)+4y=12
Step 1: Simplify both sides of the equation.
(3)(0)+4y=12
0+4y=12
(4y)+(0)=12(Combine Like Terms)
4y=12
4y=12
Step 2: Divide both sides by 4.
4y
4
=
12
4
y=3
