Answer:
0.0003
Step-by-step explanation:
for the indicated probability
we need to find : Probability (P) ( X > or = 30) = 1 - P( X < 30 )
z-score(30) = (30 - 14.6)/3.8 = 4.053
looking in z-tables for the corresponding probability
P(x<30) = 0.99997
indicated probability
P ( X > or = 30) = 1 - 0.99997 = 0.0003 (answer)
It is a trick question i believe it is already in its siplest ratio
Just like the previous one
if the ship travelled a total of 149 miles, then let's say it travelled East "d" miles and thus it travelled North the slack of 149 and "d", thus " 149 - d".
now, if the rate travelling East is say "r", then the faster rate going North is " r + 3".
solve for "r".