Need answer a helicopter is hovering at 250 feet. what's the equation for its height if it descends 16 feet per second? a) h = 16t + 250 b) h = -16t + 250 c) h = -16t - 250 d) h = 16t - 250

descending is negative

250 -16t  

h(t) = 250-16t

Choice B is the same

distance covered by pamela in 9 l of fuel = 99km

let us apply unitary method here.

distance covered by pamela in 1 l of fuel =99/9 =11 km

now let us find distance covered by pamela if she has 12 l of fuel.

distance covered in 12 l = distance covered in 1 l of fuel * 12

we know that distance covered by here in 1 l is 11 km.

so distance covered in 12 l of fuel = 11*12 = 132 km.