A new CD player costs $49.75. The sales tax is 8%. What is the total cost of the CD player?
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Answer:
The difference between the circumference of the tires is 12.56 inches.
Step-by-step explanation:
Given:
Diameter of old bicycle tires = 12 inch
Diameter of new bicycle tires = 16 inch
We need to find the difference in circumference of the tires.
Solution:
First we will find the circumference of Old bicycle tires.
Circumference can be calculated by π times diameter.
Circumference of Old bicycle tire =
Now we will find the circumference of new bicycle tire.
Circumference of New bicycle tire =
Now to find the difference between the circumference of the tires we will subtract Circumference of New bicycle tire from Circumference of Old bicycle tire we get;
framing in equation form we get;
difference between the circumference of the tires =
Hence The difference between the circumference of the tires is 12.56 inches.
The parabola with vertex at (0,0) and directrix at x=-4, will open towards the right.
<h3>What is a directrix?</h3>A parabola is a collection of points on a plane that are all at the same distance from a particular point and line. The point is called the focus of the parabola while the line is called the directrix. The directrix is perpendicular to a parabola's axis of symmetry and does not contact it.
As we know that the directrix is perpendicular to the axis of the parabola, now since the directrix is at x=-4, the parabola will be horizontal and will be opening either towards the left or the right.
As it is given that the vertex of the parabola is at (0,0) and we know that the parabola can not touch the directrix, therefore, the parabola's vertex will be at (0,0) and will open towards the right side. As shown below.
Hence, the parabola with vertex at (0,0) and directrix at x=-4, will open towards the right.
Learn more about Directrix:
