[填空题]
Squaw Valley ski arect j2mcru5+0f+: t inbvw. g4ew:fy6m8yb* hb mf+xqt r,(pv ;a in California claims that its lifts can move 47,000 people per hour. If the average lift carries people about 200 m (vertically) higherfb pm(*y mq;t:b vy+ whr8xf6,, estimate the power needed.$a\times10^b$ W a = b =
