Answer:
3 seconds
Step-by-step explanation:
16 = 160 - 16t²
16t² = 144
t² = 9
t = 3
Answer:
10 km
Step-by-step explanation:
The Angle formed by their travel is a right angled triangle (check attached picture) , hence we can apply Pythagoras rule :
Hypotenus = sqrt(opposite² + Adjacent²)
Hypotenus = distance hiked after lunch :
D = sqrt(6² + 8²)
D = sqrt(36 + 64)
D = sqrt(100)
D = 10 km
Volume of a cylinder = Height x base are
H = 6.2 m
Bae are = π.R² ; Diameter =4.4 m, then Radius = 2.2 m
Base area = π(2.2)²
And Volume=:
V= (6.2).(π,2.2²) = (6.2).(π)(.4.84) = 30.008.π ≈ 94.2 m³
(8)(-4.5) is not equivalent because 8 times -4.5 results in negative value