Answer:
5 mins difference
Step-by-step explanation:
1 3/4 hours = 1 hour and 45mins
50-45=5mins
Answer:
Step-by-step explanation:
Step-by-step explanation:
Answer:
(0.869, 12.33104)
Step-by-step explanation:
N1 = 110
N2 = 225
S1 = 24.8
S2 = 25.8
Bar x1 = 169.9
Bar x2 = 163.3
Difference in mean = 169.9 - 163.3 = 6.6
We use the z score
Alpha = 0.05
Z critical value at this alpha level = 1.96
We find standard error
√s1²/n1+s2²/n2
= √(24.8²/110 + 25.8²/225)
= 2.9239
Confidence interval
6.6 +-1.96(2.924)
(6.6-5.73104, 6.6+5.73104)
= (0.869, 12.331)
Answer:
Step-by-step explanation:
place a point at (0,0)- the starting point
next point at (2,1) - in 2 minutes she is 1 block away
Next point (4,2)- in 4 minutes she will be 2 blocks away
Connect those 3 points
then place a point at (9, 2)- 5 minutes later she was still at the store
Connect points
Point at (11,1) and (12,0) and connect
