H= 698 + 16t − 16t2. during what time interval (in seconds) will the ball be at least 26 ft above the ground? (enter your answer using interval notation.)

given: height as a function of h = 698 + 16t − 16t²   )

least height (h) =26 ft

now, from equation (i),

                  26 = 698 + 16t − 16t²

or,               t² - t - 42 = 0

or,             t² - (7-6)t - 42 = 0

or,             (t - 7) (t +6) = 0

so,                           t = 7 s or t = - 6s

we shall consider the only positive value of time because time will never be negative.

hence, the required time t = 7 s

therefore, the required height will be (26 ft, 7 s)

b is the final answer! : )

answer: the first one

step-by-step explanation: use a calculator and divide the minutes by the dollars.