After how many seconds does the object reach its maximum height?

2 seconds
3 seconds
6 seco

2-digit numbers less than 91 which are 1 less than a multiple of 10

Which statements are true? see picture

Aplane flies around trip to philadelphia it flies to philadelphia at 220 miles per hour and back home with a tailwind at 280 miles per hour if the total trip takes 6.5 hours how many miles does the plane fly round trip