Question 143176
0.5 <t< 1.5
then
-9.8(0.5)>-9.8t>1.5(-9.8)
-4.9>-9.8t>-14.7
-14.7<-9.8t<-4.9

20.3 < -9.8t+35 < 30.1 or 20.3 < v < 30.1