A store holiday sale has an item marked down by $10 with an additional discount of 25% off the
1 answer:
Answer:
C : $58.36
Step-by-step explanation:
Given:
A store holiday sale has an item marked down by $10.
Discount on new price = 25%
Final price was $36.27.
Question asked:
what was the original ?
Solution:
Let original price =
New price =
Original price - marked down amount - discount amount = $36.27
Adding both side by 7.5
Dividing both side by 0.75
Therefore, the original price was $58.36
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Answer:
4.924 years
Step-by-step explanation:
Lets denote X the lifetime of a tv tube (In years). X has distribution , with
unknown.
We know that P(X < 4) = 0.2. Using this data, we can find the value of throught standarization.
Lets call the standarization of X. Z has distribution N(0,1), and its cummulative function,
is tabulated. The values of
can be found in the attached file.
The value q such that doesnt appear on the table. We can find it by using the symmetry of the normal density function. The opposite of q, -q must verify that
, hence -q must be equal to 0.84. Thus, q = -0.84
But this value of q should match with the number , so we have
Thus, the expected lifetime of TV tubes is 4.924 years.
I hope this works for you!
Answer:
<h2>The length of RT is 3.6 units.</h2>Step-by-step explanation:
In the image attached, you can observe a representation of the problem.
Notice that we have two parallel lines with two transversal. That means we can use the proportionality theorem to create the following expression
Where ,
and
.
Replacing all values, and solving for the unknown quantity, we have
Therefore, the length of RT is 3.6 units.
