Lol I’m struggling very much

Mathematics

1 answer:

Alex73 [517]3 years ago

3 0

Look all you have to do is with each question draw a line to the answer I am going to help you. Mark the 3rd question with answer A Mark the second question with b and the first one C I might be wrong with the first one. Hope this helps

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Im confused, not sure how to do this. Please help me it is geometry, specifically perpendicular lines with an equation and a poi

marishachu [46]

The line y = -3 is a horizontal line. The perpendicular line will be vertical, so will have an equation of the form
x = c
for some constant c.

You want the vertical line to go through the point (4, -6), so the required value of c is the x-value of that point: 4

Your equation is
x = 4

7 0

3 years ago

The base of a solid in the region bounded by the graphs of y=e^-xy=0, and x=0, and x=1. cross sections of the solid perpendicula

svlad2 [7]

The diameter of each semicircular cross-section is given by the vertical distance between the curves $y=e^{-x}$ and $y=0$ , which is just $e^{-x}$ .

Given a semicircle with diameter $d$ , its area is $\dfrac{\pi d^2}8$ , so the area of each semicircular section is $\dfrac{\pi e^{-2x}}8$ .

The volume of the solid is obtained by integrating from 0 to 1:

$\displaystyle\frac\pi8\int_{x=0}^{x=1}e^{-2x}\,\mathrm dx=\frac{(e^2-1)\pi}{16e^2}$

6 0

3 years ago

Find the relative rate of change of f(x)=12+2e^-2x

Alexxx [7]

The rate of change of a given function is given by f'(x)=dy/dx
given that the function is:
f(x)=12+2^(-2x)
f'(x)=2*(-2)e^(-2x)
f'(x)=-4e^(-2x)
the relative rate of change will be the ratio of the derivative to the original function:
f'(x)/f(x)
=(12+2^(-2x))/(-4e^(-2x))

3 0

3 years ago

Read 2 more answers

The size of a television is given by the length of its diagonal. What is the size

MA_775_DIABLO [31]

Answer:

it is A. 60 in

Step-by-step explanation:

You need to use the Pythagorean theorem for this. Take the square root of (48^2 + 36^2). This will give you the length of the diagonal.

48^2 + 36^2 = 3600

Remember we need to take the square root of 3600, which is just 60.

The length of the diagonal is 60 inches.