Simplify the expression 4 + 23−|−4| A.16 B.4 C.8 D.12
1 answer:
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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
Since the radius is 6 inches, the area is
squared inches.
Now, the full circle is a sector given by a 360° angle. So, the area of a 140° angle will be proportionate:
Solving for , we have
Set . Find the tangent line
to
at the point when
:
(slope of
)
Set , the root of
. The tangent line
to
at
has slope and thus equation
which has its root at .
(The actual value of this root is about -0.6777)