Answer:

Step-by-step explanation:
The instants when hovercraft lands on the ground are those when h(x) = 0. Given that height function is a second-order polynomial in its factorized form, such instants are related to the roots of the function.
Time is a positive real number and the only possible solution:

3*10^4=30000
5*10²=500
30000-500=29500
2.95*10^4=29500
so D
Answer:
Total Distance : 1*60 +60=120
Total time taken = 1+ 60/30= 1+2=3
Hence average speed for the trip = 120/3= 40 kmph
Hence Answer is 40
Step-by-step explanation:
Answer:
meta beta
Step-by-step explanation:
diem ryugudnhkng.