Ahelicopter above the ground is descending at 3.5 m/s. it drops a package from rest (relative to the helicopter). just before it hits the ground the package is falling at a rate of 13.4 m/ s relative to the ground. find the velocity of the package relative to the helicopter.

We are given that helicopter is descending at 3.5 m/s and a package is dropped from helicopter.

Its speed relative to helicopter is 0, that means it is started with the same speed as helicopter that is 3.5 m/sec relative to ground.

And when it reaches ground, its speed is 13.4 m/sec relative to ground.

Packet speed relative to helicopter = packet speed - helicopter speed

                                          = 13.4 - 3.5 = 9.9 m/sec

maximum area = xy = (16)(32) = 512 ft2

to maximize the area of the garden, the side of the fence parallel to the side of the house should be 32 ft long, and the other two sides should both have length 16 ft.'

source

yes because there is exactly one y value for every x value

for function there can't be more than one value for every x value