The inner and outer Radii of a cylindrical pipe are 5 cm and 4 cm respectively. find the area of cross section of the pipe.

Answers

Answer 1

Answer: To do this find the area of the inner pipe, and then find the area of the outer pipe, then subtract the larger of the two from the smaller, and that is the area of the cross section

Answer 2

Answer:

Answer:

28.3 cm²

Step-by-step explanation:

You find the area of the whole section which is 5²π = 25π.

Then you find the area of the empty part which is 4²π = 16π.

Then you subtract to get 9π which is 28.27433388......

= 28.3 cm²

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The speed of a ship is given by d3, where d is the distance the ship travels in 3 hours. if the ship travels 48 miles in 3 hours, what is the speed of the ship?

The distances (y), in miles, of two cars from their starting points at certain times (x), in hours, are shown by the equations below:Car A
y = 45x + 20

Car B
y = 35x + 60

WILL UPVOTE
After how many hours will the two cars be at the same distance from their starting point and what will that distance be?

3 hours, 200 miles

3 hours, 180 miles

4 hours, 200 miles

4 hours, 180 miles

Answers

If you would like to find the amount of hours and the distance, you can calculate this using the following steps:

y = y
45x + 20 = 35x + 60
45x - 35x = 60 - 20
10x = 40
x = 40 / 10
x = 4 hours

y = 45x + 20 = 45 * 4 + 20 = 200 miles
y = 35x + 60 = 35 * 4 + 60 = 200 miles

The correct result would be 4 hours, 200 miles.

Answer:

4 hours, 200 miles

Step-by-step explanation:

Solve the equation and chech -8x+11=11

Answers

Answer: x=0
Add 11 to both sides, then multiply both sides by -8

Equations

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Let's solve the problem given to us today! The problem is the following:

$\mapsto\quad\bf{-8x+11=11}$

We need to solve for x.

__________________________________________________________

To solve this equation, you should isolate x.

__________________________________________________________

First, subtract 11 from both sides: $-8x=11-11$

Simplify: $-8x=0$

Divide both sides by -8: $x=0/-8$

Simplify: $x=0$

Therefore, x = 0.

<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<

On a trip, the fare was 50¢ for each adult and 25¢ for each child. If 30 passengers paid $12.25, how many adults and children went? Which of the following equations could not be used to solve the problem?

A. 50x + 25(30 - x) = 1225
B. 50(30 - x) + 25x = 1225
C. 25x + 50x = 30(1225)

Answers

i guess the answer is c

PLEASE ANSWER ASAP 20 POINTS + BEST GETS CHOSEN AS BRAINLIESTFind f(x+h)-f(x)/h for f(x) = x + 4.

Answers

$f(x)=x+4\n\n(f(x+h)-f(x))/(h)=((x+h+4)-(x+4))/(h)\n\n=(x+h+4-x-4)/(h)=(h)/(h)=1$

How many feet in a rod?

2.5

4.5

8.5

16.5

Answers

1 rod is equal to 16.5 feet

A subtending arc on a circle with a radius of 4.5 centimeters has an arc length of 8π. The measure of the angle subtended by the arc is °.

Answers

The arc length of a subtending arc on a circle has the formula:
s = rθ
where is the arc length
r is the radius
θ is the angle subtended

So,
θ = s/r = 8π / 4.5 = 16π/9

We multiply it with 180/π to convert it to degrees.
(16π/90) (180/π) = 320°

The correct answer

320

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