Answer: The distance between the man and the plane increasing at a rate of 400ft/s
Explanation: Please see the attachments below
I think its all four of them could be wrong but try all four !!!!!!
Surveys are considered the most reliable way to gather data
Answer: Machines according to Wikipedia is "a mechanical structure that uses power to apply forces and control movement to perform an intended action. Machines can be driven by animals and people, by natural forces such as wind and water, and by chemical, thermal, or electrical power, and include a system of mechanisms that shape the actuator input to achieve a specific application of output forces and movement ".
A pulley is a wheel on an axle or shaft that is created to support movement, it makes carry loads easier.
A pulley is a simple type of machine, which in the above explained case makes carrying a load easier.
I believe it’s 6 like it’s most likely to be the answer but I’m sorry if it’s not