Answer:
3.113, 4.507
Step-by-step explanation:
From the given values:
Mean = 3.81
Standard deviation = 1.74
Therefore
M = √(1.72/18) = 0.4
μ = M ± t(sM)
μ = 3.81 ± 1.74*0.4
μ = 3.81 ± 0.697
Recall that the mean is estimated at 90% confidence level,
Hence,
= 90% CI [3.113, 4.507]
Answer:
her score would be -22
Step-by-step explanation:
20-42=-22
2hr = 2km
1hr = 2km ÷ 2hr
= 1km
So, Tom's average speed is 1km/hr
Answer:
0.05
Step-by-step explanation:
We know that the number of marbles is represented by n. We also know that as the number of marbles increases, the volume of water W(n) decreases, since 0.05n is subtracted.
Since 0.05n is subtracted from 32, then 32 must be the original amount of water used if there are no marbles.
Since the amount of water decreases by 0.05 times the number of marbles, the volume of each marble must be 0.05.
We know that
<span>It takes Jonas ---------> 7 1/4 minutes to run the mile
7 1/4-------> (7*4+1)/4------> 29/4 minutes
</span>It takes Mario ---------> 8 5/12 minutes to run the mile
8 5/12-------> (8*12+5)/12------> 101/12 minutes
multiply (29/4) by (3/3)-------> 87/12
[101/12]-[87/12]------> 14/12 -------> 7/6 -------> 1 1/6 minutes
the answer is
1 1/6 minutes
