[填空题]
Bill can throw a ball vertically at km ie/4 0oiycojg4;a 9a speed 1.5 ti8ure ce;pn:6qwuz5 ma,i 0 r.o pe/6t1ihrg0 kmes faster than Joe can. How many times higher will B.cumhrp8i ,eanq 6ge;w: /1 r0o z5ptrk6eu0iill’s ball go than Joe’s? $\approx$ = (retain one decimal places)
