Answer:
7 hours APPOX
Step-by-step explanation:
Step one:
given data
Rachel drives an average of 50 miles per hour on a trip
speed= 50 mph
distance= 345 miles
Step two:
speed=distance/time
time= distance/speed
time= 345/50
time= 6.9 hours
time= 7 hours APPOX
Answer:
I think that it may be the last one
Step-by-step explanation:
Part A: 5 out 25 lobsters have dangerous levels of mercury
Part B: the 95% confidence interval is given by (4.45, 5.65)
since everything is given all I had to do is find the critical value which can be found from the resource packet = 2.064
Using the formula we find 5.05+-2.064*1.45/5 = ( 4.45,5.65)
For this case, we have 95% of confidence that the true mean for the average number of lobsters with dangerous levels of mercury is between 4.45,5.65
Since the square is 90 degress, its equal for each side. X would be parallel to 3 so the answer is 3. :)
Answer:
B. 7.2
Step-by-step explanation:
radius=24÷2= 12
other line =19.2÷2=9.6 because line from centre bisects chord and is perpendicular to it
Therefore: X²=√ 12²-9.6² ( theorem of Pythagoras)
X=7.2