Answer:
4w+120.
Step-by-step explanation:
She downloads 4 songs for every week which is represented as 4w, and she started with 120 songs which is represented as +120.
For a two-tailed test we need to halve 0.01, giving 0.005. Then we need to sutract 0.005 from 0.5, giving 0.5 - 0.005 = 0.495. Looking up the p value of 0.495 in an inverse normal probability table we obtain the value z = 2.5758. Therefore the critical values are -2.5758 and 2.5758.
There are 19 people total, and groups of four are being asked of us. We can use the formula for permutations or combinations.
Permutations:
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Combinations:
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Where in both scenarios, there are <em>n</em> objects being chosen at <em>r</em> times.
19 P 4 is 93024
19 C 4 is 3876
It all depends on whether order matters with group placement; if it does, your answer is
93024, if not, then your answer is
3876.:)
This question is solved using the concept of balance, and doing this, we get that:
The balance in her account will be of -$200.
Balance:
The balance of a credit card is given by the sum of all the earnings subtracted by all the spending.
Tamara:
Initial balance: $0
Purchases: $200
Earnings: $0
Subtracting earnings by purchases:
0 - 200 = -$200
The balance in her account will be of -$200.
A similar question is given at brainly.com/question/13280700