Lucy's fish tank has 14 liters of water in it. She plans to add 5 liters per minute until the tank has at least 49 liters. What
1 answer:
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Answer:
[ 1,532.41, 1,617.59]
Step-by-step explanation:
Data provided :
Sample size, n = 120
Mean = $1,575
Standard deviation = $215
Confidence level = 97%
Now,
Confidence interval = Mean ±
also,
for 97% confidence level z score = 2.17 [from standard z-table]
= $1,575 ±
= $1,575 ± 42.59
Therefore,
Confidence interval = [ $1,575 - 42.59, $1,575 + 42.59]
= [ 1,532.41, 1,617.59]
Answer:
The number of sold morning tickets are 168.
Step-by-step explanation:
Given,
Total number of tickets = 378
Total earned amount = $2929.50
Charge of each morning ticket = $6.50
Charge of each night ticket = $8.75
Solution,
Let the number of morning tickets be 'x'.
And also let the number of night tickets be 'y'.
So, the total number of tickets is the sum of number of morning tickets and number of evening tickets.
So, framing in equation form, we get;
Again, Total earned amount is the sum of number of morning tickets multiplied with charge of each ticket and number of evening tickets multiplied with charge of each ticket.
So, framing in equation form, we get;
On multiplying equation 2 by 100 on both side, we get;
Now multiplying equation 1 by '650', we get;
Now subtracting equation 4 from equation 3, we get;
Now substituting the value of'y' in equation 1, we get;
Hence The number of sold morning tickets are 168.
Whereas The number of sold night tickets are 210.