A ball is thrown vertically upward. After seconds, its height (in feet) is given by the function h(t)=104t-16t^2 . After how long will it reach its maximum height?
Do not round your answer.

The maximum height is 169 feet and the ball will reach this maximum height after seconds.

Step-by-step explanation:

The height of the ball after t seconds can be modeled with equation

The graph of this quadratic function is parabola which opens downwards.

Find the coordinates of the parabola:

The maximum height is 169 feet and the ball will reach this maximum height after seconds.

step-by-step explanation:

the original amount doesn't ''re just looking for the time it takes for 1/2 of the substance to we have

(1/2) =)     take the ln   of both sides

ln (1/2)   = )   and we can write

ln(1/2) = ) lne     and lne   = 1     so we have

ln(1/2) = -.1092t     divide both sides by -.1092

t = ln(1/2)/-.1092 = about 6.347 days = about 6.3 days (rounded)

answer: all of the odd numbers were opened

the first person was the one that was opening all of the lockers. since one is odd, this causes all of the odd number lockers to be opened in the end.