Recent content by goodz

N = 8 Mean = 2.10 stDev = 0.537 What size sample is required to construct a 95% confidence interval with a margin of error of 0.3? try n = 12, t(.975) with 11 deg. of freedom = 2.2001 so n = ( (.537* 2.2001) / (.3))^2 = 15.5 try n = 14, i get n = 14.95 n = 15, n = 14.74 Why is this a...

Homework Statement For the limit below, find values of δ that correspond to the ε values. Homework Equations epsilon = .5 and epsilon = .05 The Attempt at a Solution These kinds of problems do you have to use a graphing calculator to figure it out? for epsilon = .05 |(9x + x...

3.87 = .6(sin25)+9.8t t=.369s x= voCos25t x=.6cos25(.369) x=.20m

are you saying .6m should be negative?

I think i got it. first i needed to get the velocity using v^2 = VoSin(-25)^2 - 2(-9.8).7615 v = 3.87m/s then to get time, 3.87 = .6Sin(-25)-(-9.8)t t=.4207

Homework Statement a track is inclined in such way that the velocity of the metal ball is 60 cm/s at 25 degree below the horizontal. mathematically determine the total x displacement of the metal ball. weight of ball: 65grams height from floor to the end of the track: 76.15cm velocity of the...