An object falls 18ft in 2 seconds. Knowing the distance varies directly with the square of the time of the fall how long does it
take an object to fall 79 feet
1 answer:
Answer:
t=4.19 seconds
Step-by-step explanation:
Distance varies directly with the square of the time of the fall
It means,
D=kt^2
18ft in 2 seconds
D=kt^2
18=k*2^2
18=4k
k=18/4
=9/2
k=9/2
D=kt^2
D=79feet
79=9/2t^2
t^2=79÷9/2
t^2=79×2/9
=158/9
t=√158/√9
t=12.57/3
t=4.19 seconds
You might be interested in
Answer:
10) 87.96 in
15) 272,944.7 in
1) B
2) C
can you help me? since I helped you?
Answer:
4
Step-by-step explanation:
3x-5=7x-21
3x-7x=5-21
-4x=-16 ( divide by -4 both sides)
x= 4
239.99 x 75%(75/100) ~ $180
$180 x 90%(90/100) = $162
Answer:
He can make 20 cakes
Step-by-step explanation:
Im in highshool so I know the answer
