Answer:
2.86 seconds
Step-by-step explanation:
We presume the height is measured above the ground, so the height when the ball hits the ground is 0 feet. Putting that into the equation and solving for t, we get ...
0 = 157 -9t -16t^2
We can use the quadratic formula with a=-16, b=-9, c=157 to find the solution.
t = (-b -√(b^2 -4ac))/(2a) . . . . . we are not interested in the negative solution
t = (-(-9) -√((-9)^2 -4(-16)(157)))/(2(-16))
t = (9 -√10129)/-32 = (9 -100.6429)/-32 ≈ 2.86384
The ball will hit the ground about 2.86 seconds after it is thrown.
A line totally can have a line of symmetry. while it does not have width (therefore cannot put the line of symmetry through its "width"), it does have a length like any other shape. If we take a 4 unit line, we could put the line of symmetry at the 2 unit mark.
^sorry, im rushing a bit so you might have to paraphrase !
To do groups of 9, she could make 2 rows of 9. To do 3, she could do 6 rows of 3. Last, to do 6 she could do 3 rows of 6. :)
Answer:
Circle requires ≈ 20 m of edging
Step-by-step explanation:
A = πR²
R = √(A/π)
C = 2πR = 2π√(A/π)
C = 2π√(30/π) = 19.41625... ≈ 20 m
square needs ≈ 22 m of edging
equilateral triangle needs ≈ 25 m of edging
The answer is 29.
I hope it helps if not pls let me know
