Aparachutist descends 20 feet in 2 seconds. express the rate of the parachutist's change in height as a unit rate.

well 20/2 = 10 so 10 is the answer

the answer would be 10 feet in one second

Step-by-step explanation:

you find the unit rate by dividing both of the numbers in half, but that is only this case. if it was 30 feet in 5 seconds you would divide them , so 30/5 equals 6, so that answer would be 6 feet a second. another example for this problem would be 20/2 which would be 10, so 10 feet in one second

it is a. 4.2 because 7.6-3.4 gets the remaining length of 4.2. i might be wrong but i am pretty sure this is the answer.

answer: 4 meters

step-by-step explanation: to you understand 2/3 better you can do 1 divided by 3 = . then multiply that by the 2 which is .66666666666666667 then you would do 6 x .66666666666666667 which is 4.      

hope this .