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Vilka [71]
3 years ago
11

The graph shows how many cans of each type of cat food were sold one day. (View picture)

Mathematics
1 answer:
sleet_krkn [62]3 years ago
3 0
It's very easy!
.
First of all, add up all the amounts of all can flavors.
.
What do you think it approximates to?
.
I'd say 245.
.
Now, how much is 30 out of 245?
.
Around 24%.
.
So, what's 245/100? (100 because it is default maximum percentage number)
<span>.  
</span>2.45.
.
24 divided by 2.45?
.
Around 9%.
.
Your best guess is 10% or D.
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A radio telescope has a parabolic surface, as shown below.
krek1111 [17]
OK, so the graph is a parabola, with points x=0,y=0; x=6,y=-9; and x=12,y=0

Because the roots of the equation are 0 and 12, we know the formula is therefore of the form

y = ax(x - 12), for some a

So put in x = 6

-9 = 6a(-6)

9 = 36a

a = 1/4

So the parabola has a curve y = x(x-12) / 4, which can also be written y = 0.25x² - 3x

The gradient of this is dy/dx = 0.5x - 3

The key property of a parabolic dish is that it focuses radio waves travelling parallel to the y axis to a single point. So we should arrive at the same focal point no matter what point we chose to look at. So we can pick any point we like - e.g. the point x = 4, y = -8

Gradient of the parabolic mirror at x = 4 is -1

So the gradient of the normal to the mirror at x = 4 is therefore 1.

Radio waves initially travelling vertically downwards are reflected about the normal - which has a gradient of 1, so they're reflected so that they are travelling horizontally. So they arrive parallel to the y axis, and leave parallel to the x axis.

So the focal point is at y = -8, i.e. 1 metre above the back of the dish.
5 0
2 years ago
Help i dont know the formula for the triangle to find the answer its surface area n volume
777dan777 [17]

Answer:

#4=10.5

#5=48

Step-by-step explanation:

The formula for the triangle for area is 1/2 time base times hight

The forumale fot the triangle for volume is 1/2 time base times hight

So for number #4 it will be 1/2 x 3 x 7

and number #5, it will be 1/2 x 8 x 12

5 0
3 years ago
Select the equivalent expression.
olasank [31]

Answer:

Answer Choice 'A' would be correct.

7 0
3 years ago
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Given the following functions f(x) and g(x), solve f[g(6)] and select the correct answer below:
igomit [66]
B. 0

G(6)= 6 - 8 = -2

F(-2) = 6(-2) + 12 = 0
6 0
3 years ago
Inver laplace <br><br><img src="https://tex.z-dn.net/?f=%20%7Bl%7D%5E%7B%20-%201%7D%20%28%20%20%5Cfrac%7Bs%7D%7B%28%20%20%7Bs%7D
kipiarov [429]

Answer:

              s

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ls^4 + 32ls^2 + 256l

Step-by-step explanation:

I used an algebra calculator called MathPapa to solve your equation.

Also, welcome to brainly!

7 0
2 years ago
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