In ΔDEF, the measure of ∠F=90°, the measure of ∠D=62°, and FD = 3.5 feet. Find the length of DE to the nearest tenth of a foot.
2 answers:
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Answer:
Step-by-step explanation:
Fixed monthly fee = $20
Amount charged per minute for long distance calls = $0.20
denotes total cost such that
minutes are used for long distance calls.
Amount charged for minutes for long distance calls
Therefore, an equation for the total cost, C, when N minutes are used for long distance calls is
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Answer:
Part a) The area of the figure is
Part b) The perimeter of the figure is
Step-by-step explanation:
Step 1
Find the area of the figure
In this problem we have that
The figure ABC is the half of a square and the other figure is a semicircle
<u>Find the area of the figure ABC</u>
we have
The area of the half square ABC is equal to find the area of triangle ABC
so
<u>Find the area of the semicircle</u>
The area of the semicircle is equal to
we have that
substitute
The area of the figure is equal to
Step 2
Find the perimeter of the figure
The perimeter of the figure is equal to
we have
Applying Pythagoras theorem
Remember that
the circumference of a semicircle is equal to
The perimeter of the figure is equal to
Simplify