The height of the ramp is 9 meter
<u>Solution:</u>
It is given that a skateboard ramp is 15 meters long and it extends 12 meters from the base of the starting point.
If we look at the sum, closely we understand that the ramp is a right angled triangle.
Which has a base length of 12 metres and a hypotenuse of 15 metres.
We need to find its height.
To do so we can use the Pythagoras theorem
Pythagorean theorem, states that the square of the length of the hypotenuse is equal to the sum of squares of the lengths of other two sides of the right-angled triangle.
By above definition, we get
Since we already know the lengths of the hypotenuse and base we can substitute them in the formula and solve for the height.
Let height of the ramp be denoted by ‘h’
Therefore, the height of the ramp is 9 meter
Refractive index is the ratio of sin(i) to sin (r). Medium 2 is sodium chloride with a refractive index of 1.54.
<h3>What is Refractive Index?</h3>
A material's refractive index (sometimes called refraction index or index of refraction) is a dimensionless quantity that specifies how quickly light passes through it.
As we know that the Refractive index is the ratio of sin(i) to sin (r), and it can be represented as,
where
i is the incident angle and
r is the refraction angle.
Now, the refractive index can be written as for the given medium can be written as,
Now, if we take the ratio of the refractive index of the two mediums, then
Hence, Medium 2 is sodium chloride with a refractive index of 1.54.
Learn more about Refractive Index:
brainly.com/question/17156275
Using linear function concepts, the y-intercept of AB is of 11.2.
<h3>What is a linear function?</h3>
A linear function is modeled by:
y = mx + b
In which:
- m is the slope, which is the rate of change, that is, by how much y changes when x changes by 1.
- b is the y-intercept, which is the value of y when x = 0, and can also be interpreted as the initial value of the function.
Given two points of a line, the slope is given by <u>change in y divided by change in x,</u> hence, for A(8,0) and B(3,7):
m = (7 - 0)/(3 - 8) = -7/5 = -1.4.
Then:
y = -1.4x + b.
When x = 8, y = 0, hence we use it to find the y-intercept b as follows:
0 = -1.4(8) + b
b = 11.2.
The y-intercept is of 11.2.
More can be learned about linear function concepts at brainly.com/question/24808124
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Answer:
80
Step-by-step explanation:
Answer:
220
Step-by-step explanation:
55 percentage of x = 121
so X = 220
as simple as that
