The distance the rock has to travel to hit the ground is 400ft.
400 = 16 * t^2divide both sides by 16 and take the square root.
<span>25=t^2
</span>
5=t
The answer is 314,000,000 ft^2
pi r^2
3.14* 10,000^2
3.14*100,000,000
314,000,000
van = v, bus = b, students = s
v + 6b = 372s ...eqn 1
4v + 12b = 780s ...eqn 2
divide eqn 2 by 4
v + 3b = 195s ...eqn 3
eqn 1 - eqn 3
3b = 177s
b = 59s
subst b = 59 in eqn 1
v + 354s = 372s
v = 18s
answer: each van holds 18 students and each bus holds 59 students
25% = 0.25
Therefore, if we want to find 25% <em>of</em> 279.00 , we multiply 0.25 · 279 = 69.75