The answer is <span>a) 1000=-16t^2+1700, implies t² = -700 /-16, and t= 6.61s b) </span><span>970= -16t^2+1700, </span><span>implies t² = -730 /-16, and t=6.75s
c) reasonable domain of h h is polynomial function, so its domain is R, (all real number) its range the inverse of h is h^-1 = sqrt (1700- t / 16), and its domain is </span> <span><span><span>1700- t / 16>=0, so t <1700, the range of h is I= ]-infinity, 1700]</span> </span> </span>