All categories

3 years ago

Help QUICKLY please! ill mark brainliest

Mathematics

1 answer:

Schach [20]3 years ago

7 0

Answer:

It should be 905m3

Step-by-step explanation:

Result

Volume =

4 πr3

4 ×π×63

= 288π

= 904.77868423386 feet3

Even if it says feet, the measure doesn't really matter on this one.

You might be interested in

Why did I just to be good at math but now I don't understand any of it my knowledge just flew away, can someone please explain h

Allisa [31]

As you get older your brain develops as you do so when you’re taught math your brain is developing a slightly slower pace than it should be for example if you have a teacher who doesn’t really teach a lot it’s really going to slow down the process of learning

4 0

3 years ago

46 decreased by twice the number

snow_lady [41]

-46

Hope this helps!

May I please have brainliest? :D

4 0

3 years ago

Read 2 more answers

Write the equation of a line that is perpendicular to y=2/7x +9 and that passes through the point (4,-6).

Allisa [31]

Answer:

$y=-\frac{7}{2}x+8$

Step-by-step explanation:

Given the equation

$y\:=\:\frac{2}{7}x+9$

comparing the equation with the slope-intercept form

$y =mx+b$

Here,

m is the slope

y is the intercept

so the slope of the line is 2/7

As we know that the slope of the perpendicular line is basically the negative reciprocal of the slope of the line, so

the slope of the perpendicular line will be: -7/2

Therefore, the point-slope form of the equation of the perpendicular line that goes through (4,-6) is:

$y-y_1=m\left(x-x_1\right)$

$y-\left(-6\right)=\frac{-7}{2}\left(x-4\right)$

$y+6=\frac{-7}{2}\left(x-4\right)$

$y+6-6=\frac{-7}{2}\left(x-4\right)-6$

$y=-\frac{7}{2}x+8$

3 0

3 years ago

A machinist earns $647.50 for working a 35-hour week. What is the machinist's hourly rate of pay?

Oxana [17]

Answer:

<em><u>$18.50</u></em>

Step-by-step explanation:

$647.50 ÷ 35 (as its the hours they work).

You do this to find the value of one hour..

= $18.50 Every hour!

5 0

3 years ago

what are the x-coordinates for the maximum points in the function f(x) = 4 cos(2x- pi) from x = 0 to x= 2 pi?

julsineya [31]

Answer:

$\frac{\pi }{2}$ and $\frac{3\pi }{2}$

Step-by-step explanation:

To find the max points we need to take the derivative of the function and then find the critical values.

First we take the derivative:

$f(x) = 4cos(2x-\pi )\\f'(x)=-4sin(2x-\pi )(2)\\f'(x)=-8sin(2x-\pi )\\$

Now we need to find when f'(x)=0 to find the critical values.

$0=-8sin(2x-\pi )\\0=sin(2x-\pi )\\sin^{-1}0=2x-\pi \\0=2x-\pi \\\pi =2x\\\frac{\pi }{2} =x$

The critical values will be

$\frac{\pi }{2} n$ for any integer n

between 0 and 2 pi, the critical values will be

$0, \frac{\pi }{2} ,\pi ,\frac{3\pi }{2},2\pi$

We can determine if these are minimums or maximums by using the second derivative test.

So we need to take the second derivative;

$f'(x)=-8sin(2x-\pi )\\f''(x) = -8cos(2x-\pi )(2)\\f''(x)=-16cos(2x-\pi)$

We need to see if the second derivative is positive or negative to determine if it is a max or min.

$f''(0) = 16\\f''(\frac{\pi}{2})=-16\\f''(\pi )=16\\f''(\frac{2\pi}{3}) = -16\\$

Since the second derivative is negative at

$\frac{\pi }{2}$ and $\frac{3\pi }{2}$

we know both of those are the x-values of maximums.

5 0

4 years ago