a metal pipe is 77 cm long the inner diameter of the cross section is 4 cm and the outer diameter is 4.8 cm find the (i) inner curved surface area (ii) outer curved surface area (iii) total surface area
Answer with full step by step explaination
Answer:
Step-by-step explanation:
outer area=
first need to find the circumference of outer diameter
= π×4.8
= 15.079644.... cm
to find the outer curved area you would then do
= 77×15.079644
(ii) =1161.13264 cm²
inner curve area
circumference= π×4
=12.5663706.... cm
77×12.5663706
(i) =967.610537 cm²
total surface area=
as the outer and inner curved areas are already found only the top and bottom surfaces need to be
= area of larger circle
=π×4.8²
=72.382294.... cm²
smaller circle
=π×4²
=50.2654824.... cm²
72.382...-50.265
=22.1168116 x 2
=44.2336232 cm²
total surface area
(iii)= 2172.9768 cm²
(round this to however many decimals you need)
I hope this is understandable and useful!
also how many marks is this for?
Here is another question. It wants me to solve it
Answer:
[tex]x>-11[/tex]
Step-by-step explanation:
[tex]10+2x>-12[/tex]
Subtract both sides by 10
[tex]10+2x-10>-12-10\\2x>-22[/tex]
Divide both sides by 2
[tex]\frac{2x}{2}>\frac{-22}{2} \\x>-11[/tex]
I hope this helps!
Answer:
x > -11
Step-by-step explanation:
A pie chart uses 360 degrees to represent 45 people. How many people are represented by an angle of 152 degrees
Answer: 19 people will be represented by an angle 152 degrees.
Step-by-step explanation:
Set up a proportional relationship to solve for this
[tex]\frac{360}{152} = \frac{45}{y}[/tex] Cross multiply
360y = 6840 Divide both sides by 360
y = 19
In triangle ABC, ∠Ais a right angle and m∠B=45°. Fnd BC. Give EXACT answer. (Hint: Exact means the radical form.)
I need help with a few trig questions
how is the orientation of and image affected by translation
Answer:
is this helping?
Step-by-step explanation:
it helps show the words better
sorry if wrong or late qwq
your amazing
A room has a maximum capacity of 396 people. How many people are allowed in the room at anytime?
solve the following equation
3(y – 2) + 2y = 9
Answer:
3( y - 2) + 2y =9
Step-by-step explanation:
It equals 3.
Answer:
y=3
Step-by-step explanation:
3(y-2)+2y=9
3y-6+2y=9
Isolate the variable y by transposing
3y+2y=6+9
5y=15
Simplify
y=3
Find the Surface Area of the following figure:
16 ft
10 ft
7 ft
Answer:
1120
Step-by-step explanation:
If you like vampire diaries plz tell me DAMON OR STEFAN......
Answer:
i like both of them
Step-by-step explanation:
Point A is located at (-1.4). Point B is located at (3,2). What is the slope of the line that passes through these two points (Make sure your slope is
reduced, if possible)?
6
Answer:
Y = -1/2x + 7/2
Step-by-step explanation:
slope = -1/2
what is the total cost of a $52 lunch with a 20% tip?
Answer: 62.4$
Step-by-step explanation: 20% of 52 is 10.4
30.1593 rounded to the nearest hundredth NOW PLEASE
Answer:
30.16
Step-by-step explanation:
Hi could you help pls it is due tonight at 11:59 and its 10:47
Answer:
The slope is 1 or 1/1
Step-by-step explanation:
Solve it by using rise over run.
Hope this helps! :)
Can somebody plz help answer both these word problems and (write amp equation for each problem and solve) thx :3
WILL MARK BRAINLIEST WHOEVER ANSWERS THESE FIRST!!!:DDD
Answer:
14. She deposited $15.50 into her bank.
15. The width would be 900.
Step-by-step explanation:
14. 245.60 + x = 261.10
x = 15.50
245.60 + 15.50 = 261.10.
She deposited $15.50 into her bank and resulted in her new bank balance appearing as $261.10.
15. Width is 900 cm
Length is 12 cm.
A = L X W = 108
A = L * 3/4L
108 = 3/4L2
Divide both sides by 3/4: multiply both sides by the inverse of 3/4 or 4/3.
(4/3)*108 = L2
144 = L2
√144 = L
12 = L
W = 3/4*12
W = 9
Before we finish:
A = 108 = 9 x 12 = 108
W/L = 3/4 = 9/12 = 3/4
The width of the rectangle would be 3/4.
if the ratio of two numbers is 2;3 and their G.C.F is 8 what is their L.C.M
Expert Answer:
Since the numbers are in the ratio 3:4 then let the numbers be 3x and 4x.
Thus the H.C.F. of the two numbers = x.
But the H.C.F is given as 4.
So, x = 4.
So, the numbers are,I
3x = 3 x 4 =12
And
4x = 4 x 4 = 16
We know,
H.C.F x L.C.M = Product of the two numbers
4 x L.C.M = 12 x 16
L.C.M = 48
Thus, the L.C.M of 12 and 16 , 48
I’ll love u forever if u help with this ASAP plzzzzzzz just zoom in if u can’t see it I don’t get it
Pls help me thank you <3
Solving by GCF
1)7x^2+2x=0
Solution(s) are is:
2)5b^2-10b=0
Solution(s) are is:
3)3d^2-d=0
Solution(s) are is:
4)17x^2+51x=0
Solution(s) are is:
Answer:
1. 9x³
2.5b³
3.2d
4. 68x³
9514 1404 393
Answer:
0, -2/70, 20, 1/30, -3Step-by-step explanation:
Factoring out the greatest common factor in each case, we can simplify the process of finding the non-zero solution. The solutions are the values of the variable that make the factors be zero.
1) 7x^2 +2x = 0 = (x)(7x +2) ⇒ x = 0; x = -2/7
__
2) 5b^2 -10b = 0 = (5b)(b -2) ⇒ b = 0; b = 2
__
3) 3d^2 -d = 0 = d(3d -1) ⇒ d = 0; d = 1/3
__
4) 17x^2 +51x = 0 = 17x(x +3) ⇒ x = 0; x = -3
!!!!!!PLS HELP!!!!!!
Answer:
55%
Step-by-step explanation:
1/4 - Micah will only have a 25% chance of selecting a blue pencil.
1/5 - Micah will only have a 20% chance of selecting a red pencil.
So, to conclude this, Micah only has a 55% chance of selecting a yellow pencil.
what is 40 times 60 equalsssssss
Answer:
2400 is ur awnser
Step-by-step explanation:
Answer:
it is 2,400
Step-by-step explanation:
you multiply 6x4 and add two zeros to the answer
The product of a number and 9 falls short of 78 by 6, what is the number? Show working.
Answer:
8
Step-by-step explanation:
78 - 6 = 72 (Since the number falls short by six)
72 ÷ 9 = 8 (Number times 9 that equals 72)
PLEASE HELP I WILL MARK YOU BRAINLIEST The function h(t)=- 16t^2 +92t describes the height of a model rocket. Use technology to graph the
function and answer the questions below. Round your answers to the nearest hundredths (3 points)
a. At what times is the model rocket at a height of 100 feet?
b. For how long is the rocket in the air?
Answer:
Step-by-step explanation:
100 = -16t^2 + 92t
16t^2-92t + 100 = 0
4t^2 - 23t + 25 = 0
t = [23 ±√(23^2-4(4)(25))]/[2(8)] ≈ 1.5, 4.3
The rocket has altitude of 100 ft at 1.5 sec and 4.3 sec.
:::::
0 = 16t^2-92t = t(16t-92)
t = 0, 5.75
Rocket is in the air for 5.75 seconds
notación exponencial de 2.500.000
Answer:
bjfdkkdkdkdieiekwkwkwkekkedlllldkd
what is opportunity sampling
Answer:
Opportunity sampling is also known as convenience and it can be defined as a sampling technique which typically involves the process of selecting participants from a population of interest (target group) to take part in a research study.
Step-by-step explanation:
In Statistics, sampling can be defined as a process used to collect or select data (objects, observations, or individuals) from a larger statistical population using specific procedures.
There are various types of sampling used by researchers and these are;
1. Random sampling.
2. Systematic sampling.
3. Stratified sampling.
4. Cluster sampling.
5. Opportunity or convenience sampling.
Opportunity sampling is also known as convenience and it can be defined as a sampling technique which typically involves the process of selecting participants from a population of interest (target group) to take part in a research study.
This ultimately implies that, an opportunity sampling is a non-probability sampling in which a researcher select participants based on their availability for the study.
For example, John a psychologist standing on the street requesting that passersby join in his research study.
the gradient of the line y = x+3y=9
Answer:
change the expression to y
Step-by-step explanation:
[tex]x + 3y = 9[/tex]
[tex]3y = - x + 9[/tex]
[tex]y = \frac{ - 1}{3} x + \frac{9}{3} [/tex]
the gradient is the coefficient of x,
[tex] - \frac{1}{3} [/tex]
The diameter of a circle is 14 m. Find the circumference to the nearest tenth to the nearest tenth.
Answer:
43.98
Step-by-step explanation:
You have to multiply 14 times Pi which is approximately 3.14 and then round to the nearest ten.
can anyone help me with this
Answer:
a)$2800 , $0
b)$1600 , $0
c)$2800 , $0
d)$1650 , $0
e)$4400 , $0
f)$1020 , $0
g)$1405 , $0
h)$5400 , $0
A six-sided die is rolled. What is the probability of landing on a number less than 3? Put our answer in simplest form.
Answer:
1/3
Step-by-step explanation:
2/6
1/3
Answer:
Probability of any one face to turn up is 1/6,
The probability of any above 3 is 3/6,
The probability of even number is also 3/6
So the probability of either above three or even outcome is 1/6(3/6 + 3/6)=1/6, since both events are independent of the any face event and both events are mutually exclusive.
NB:If the two events are not mutually exclusive, then
P(A) is the total event, P(B) the probability of any face above 3 and P(C) probability of any face an even number, then the Bayesian prediction formula is P(B|C) the probability of the event B occuring while C occurs is equal to (PC|P(B))/(P(B)+P(C), where P(C|B) is probability of C occuring at B.
So P(B|C)=(1/3 * 1/3)/(1/3 + 1/3) =(1/9)/(2/3) = 3/18= 1/6.
y=4x+3
2x-3y=21
SHOW YOUR WORK
Step-by-step explanation:
y = 4x+3
2x-3y = 21
2x -3(4x+3) = 21
2x -12x -9 = 21
-10x = 21 + 9
-10x = 30
x = -3
Two vertices of a right triangle have coordinates (3, 7) and (3, 10). The segment that connects these points is a leg of the triangle
Which set of coordinates for the third vertex would create a right triangle?
O (4,4)
O (7,8)
O (8,7)
O (4,8)
Answer:
8,7
Step-by-step explanation:
i hope this helps!
Solve the equation: 12(x + 8) = 11x - 5 What is the solution?
Answer:
We conclude that the solution is:
[tex]x = -101[/tex]Step-by-step explanation:
Given the equation
[tex]12\left(x\:+\:8\right)\:=\:11x\:-\:5[/tex]
Expand 12(x + 8): 12x + 96
[tex]12x+96=11x-5[/tex]
Subtract 96 from both sides
[tex]12x+96-96=11x-5-96[/tex]
Simplify
[tex]12x=11x-101[/tex]
Subtract 11x from both sides
[tex]12x-11x=11x-101-11x[/tex]
Simplify
[tex]x=-101[/tex]
Therefore, we conclude that the solution is:
[tex]x = -101[/tex]