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Irina18 [472]
3 years ago
7

WILL MARK BRAINLIEST!!!!

Mathematics
1 answer:
Kitty [74]3 years ago
3 0

Answer:

20\pi

Step-by-step explanation:

Let the radius of the disk be r centimeters. Since the area of the disk is 100pi sq cm, we have \pi r^2=100\pi, and since r is positive, r=10. The circumference of a circle is 2\pi r, which, in this case, is \boxed{20\pi}.

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Answer:

Two angles are called supplementary when their measures add up to 180 degrees.

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3 years ago
S.O.S help !!!!!!!!!!!!!!!!
Svetradugi [14.3K]
It means on the 4th day, 88 boats will pass. So the 3rd answer down is correct.
4 0
3 years ago
What is the surface area of the triangular prism?<br><br><br> ​
Sergeu [11.5K]

Good morning ☕️

Answer:

<h2>168 ft²</h2>

Step-by-step explanation:

the surface area of the triangular prism =

2×(the base’s area) + the lateral area

the base’s area =

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the lateral area =

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finally,

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___________________________________________

:)

7 0
3 years ago
2x^4y^-4<br> —————<br> 8x^7y^3
bazaltina [42]

Answer:

16x11/y (i hope)

Step-by-step explanation:

5 0
3 years ago
Im confused..I feel as if what I’m learning in class itself is not as difficult as the problems my teacher gives us to take home
RideAnS [48]
Ok, so remember that the derivitive of the position function is the velocty function and the derivitive of the velocity function is the accceleration function

x(t) is the positon function
so just take the derivitive of 3t/π +cos(t) twice
first derivitive is 3/π-sin(t)
2nd derivitive is -cos(t)
a(t)=-cos(t)

on the interval [π/2,5π/2) where does -cos(t)=1? or where does cos(t)=-1?
at t=π
so now plug that in for t in the position function to find the position at time t=π
x(π)=3(π)/π+cos(π)
x(π)=3-1
x(π)=2
so the position is 2







ok, that graph is the first derivitive of f(x)
the function f(x) is increaseing when the slope is positive
it is concave up when the 2nd derivitive of f(x) is positive

we are given f'(x), the derivitive of f(x)
we want to find where it is increasing AND where it is concave down

it is increasing when the derivitive is positive, so just find where the graph is positive (that's about from -2 to 4)

it is concave down when the second derivitive (aka derivitive of the first derivitive aka slope of the first derivitive) is negative
where is the slope negative?
from about x=0 to x=2
and that's in our range of being increasing
so the interval is (0,2)
4 0
3 years ago
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