Answers
Answer:
B. 48 cm²Step-by-step explanation:
The area between the concentric circles:
A = π(R² - r²)If we tale π ≈ 3, we know R = 5 cm, we see r = R - 2 = 5 - 2 = 3 cm, then
A = 3(5² - 3²) = 3(16) = 48 cm²Correct choice is B
Related Questions
My friend asked me what the answer is as a Joke but I really don't know the answer someone please help. I don't want to look bad
Answers
Answer:
d I believe
Step-by-step explanation:
so they take away certain blocks and they never replaced the 2 lines
Answer:
I think it's C, it looks really tricky.
Step-by-step explanation:
Lucas found a punctured bouncy ball in his basement. He wants to know how much air
used to fill up the entire ball. The diameter of the ball is 6 in. Find the volume. Use 3.14
for pi.
Answers
Answer:
its the 113 inches cubed
Answer:
113.04 in3
Step-by-step explanation:
PLEASE PLEASE PLEASE HELP
Complete this table by entering the addictive inverse of each number.
Answers
Answer:
66. 4/8
Step-by-step explanation:
Answer:
-27 -> 27, - 8/3 -> 8/3
Step-by-step explanation:
-27 + 27 = 0
-3/8 + 3/8 = 0
Find the slope of the coordinates plane points
Answers
Answer:
-2
Step-by-step explanation:
When they give you 2 points use the formula so y2-y1/x2-x1
So -2-8/1 - -4
-10/1+4 so -10/5 = -2
i need help with this
Answers
Answer:
20
Step-by-step explanation:
Hello There!
So first we need to determine what the formula for area of a trapezoid is
[tex]A=\frac{a+b}{2} h[/tex]
where a and b = bases and h = height
the given information is the area and the two bases
so we plug in the given information and solve for h
[tex]180=\frac{4+14}{2} h\\4+14=18\\\frac{18}{2} =9\\180=9h[/tex]
divide each side by 9
[tex]\frac{180}{9} =20\\\frac{9h}{9} =h[/tex]
we're left with
h=20
so we can conclude that the height is 20
Somebody help me asap please giving brainliest
Answers
Help plz need the answer asap
Answers
Answer:
The video is blocked but you can type your question on here1
Step-by-step explanation:
Suppose in this semester, our Exam 1 average was about 86 with an SD of about 10. Suppose the correlation between our Exam 1 and Exam 2 scores will be similar to what it has been in the past, about 0.6, and finally, suppose our Exam 2 scores will be similar to previous semesters' Exam 2 scores with an average of 76 and a SD of 8.2. Use this information to answer the following questions:
1. What is the slope of the regression equation for predicting our Exam 2 scores from Exam 1 scores? Round to 3 decimal places.
2. What is the y-intercept of the regression equation for predicting our Exam 2 scores from Exam 1 scores? Round to 3 decimal places.
Answers
Answer:
the slope of the regression equation for predicting our Exam 2 scores from Exam 1 scores is 0.492
And the y-intercept of the regression equation for predicting our Exam 2 scores from Exam 1 is 33.688
Step-by-step explanation:
Given the data in the question;
mean X" = 86
SD σx = 10
Y" = 76
SD σy = 8.2
r = 0.6
Here, Exam 2 is dependent and Exam 1 is independent.
The Regression equation is
y - Y" = r × σy/σx ( x - x" )
we substitute
y - 76 = 0.6 × 8.2/10 ( x - 86 )
y - 76 = 0.492( x - 86 )
y - 76 = 0.492x - 42.312
y = 0.492x - 42.312 + 76
y = 0.492x + 33.688
Hence, the slope of the regression equation for predicting our Exam 2 scores from Exam 1 scores is 0.492
And the y-intercept of the regression equation for predicting our Exam 2 scores from Exam 1 is 33.688
(THIS IS NOT A TEST OR AN ASSESSMENT QUESTION)
Hugo averages 32 home runs per season with a standard deviation of 2.5. Jacob averages 27 home runs per season with a standard deviation of 1.6. Last season Hugo hit 36 home runs and Jacob hit 31 home runs. Who had more home runs relative to their usual seasonal average? Explain.
Answers
Answer:
Jacob had more home runs relative to his usual season average than Hugo did.
Step-by-step explanation:
The key solving this is to express their respective home runs in z-value forms.
Z = (x - ų)/óx
X = Current home runs
Ų = Mean
= Meanóx = Standard deviation
For Hugo,
X = Current home run = 31
Ų = Mean = 27
Óx = Stardard deviation = 1.6
Z = (x - ų)/óx
Z = (31 - 27)/1.6 = 2.5
Hope this helped!!!
The person who had more home runs relative to their usual seasonal average was Jacob.
Calculations and Parameters:Representing their home runs in z-value forms.
Where
Z = (x - ų)/óxX = Current home runsŲ = Mean= Meanóx = Standard deviation
To find the home run for Hugo,
X = Current home run = 31Ų = Mean = 27Óx = Stardard deviation = 1.6Therefore,
Z = (x - ų)/óx
Z = (31 - 27)/1.6
= 2.5
Hence, Jacob had the most home runs relative to their usual seasonal average.
Read more about standard deviation here:
https://brainly.com/question/12402189
Use polar coordinates to find the volume of the given solid. Bounded by the paraboloid z = 6 + 2x2 + 2y2 and the plane z = 12 in the first octant
Answers
Answer:
[tex]\frac{9\pi }{4}[/tex]
Step-by-step explanation:
Paraboloid z = 6 + 2x^2 + 2y^2 ----- ( 1 )
plane z = 12
equation 1 becomes
12 = 6 + 2( x^2 + y^2 )
hence : ( x^2 + y^2 ) = 3
This shows that the solid lies under the parabolic and above the disk 0 : x^2 + y^2 ≤ 3
attached below is the remaining part of the solution
HELP MEEE!
Find the area and volume for both.
Answers
Answer:
Step-by-step explanation:
3.
area of one triangular face = ½×16×30 = 240 in²
area of base = 30×9 = 270 in²
area of diagonal face = 34×9 = 306 in²
area of vertical face = 16×9 = 144 in²
surface area = 2×240 + 270 + 306 + 144 = 1,200 in²
volume = 240×9 = 2,160 in³
:::::
4.
area of one triangular face = ½×10×10.5 = 52.5 ft²
area of base = 10.5×6 = 270 ft²
area of diagonal face = 14.5×6 = 87 ft²
area of vertical face = 10×6 = 60 ft²
surface area = 522 ft²
volume = 52.5×6 = 315 ft³
6
Solve the inequality. Graph the solution.
11.3 > b /4.3
The solution is
Answers
Step-by-step explanation:
Multiply to remove the fraction, then set equal to
0 and solve.
Inequality Form:
b<48.59
Interval Notation:
(−∞, 48.59)
The solution of the inequality 11.3 > b /4.3 is b< 48.59 along with the number line.
Given Inequality:
11.3 > b /4.3
To solve the inequality 11.3 > b / 4.3,
Multiply both sides of the inequality by 4.3 to eliminate the fraction:
11.3 * 4.3 > (b / 4.3) * 4.3
48.59 > b
The solution to the inequality is b < 48.59.
This means that any value of b that is less than 48.59 will satisfy the inequality.
To graph the solution, indicate that b is less than 48.59 by using an open circle at 48.59 and shading the line to the left of the open circle to represent all the values that satisfy the inequality.
Learn more about Inequality here:
https://brainly.com/question/20383699
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What is the slope of the line that passes through the points (-8,-1) and (-12,-2) ?
Answers
Answer:
1/3
Step-by-step explanation:
To find the slope subtract the second y-coordinate from the first y-coordinate and divide it by the result of the second x-coordinate from the first.
-2 - -1 = -1
-12 - -8= -3
-1/-3 = 1/3
Answer:
the answer is 4/1. Or just 4.
Step-by-step explanation:
-8-(-12) is -8+12=4. Then -1-(-2) is -1+2=1.
Emma is driving at a constant speed. She drives 4 miles in 5 minutes. If she continues to drive at the same speed, how many miles will she drive in 15 minutes? Use a proportion to solve.
A:3 miles B:12 miles C:20miles D:60miles
Answers
Answer:
D. 60 Miles
Step-by-step explanation:
Amath class has a total of 45 students. The number of males is 13 more than the number of females. How many males and
how many females are in the class
Number of males:
Number of females
Answers
Answer:
Males: 29
Females: 16
Step-by-step explanation:
2x+ 13 = 45
2x = 45 - 13
2x = 32
x = 16
16 + 13 = 29
29 +16 = 45
Which quantitiy can be described as changing at a constant rate?
A
The number of people involved in a shared email, if each person must share the email they received with 7 new people.
B
The number of players left in a tournament, when half of the players are eliminated each turn.
C
A flu virus, which will infect 3 new people for every 1 person infected.
D
The total number of logs used for a bonfire, if 5 new logs are added each hour.
Answers
Answer:a
Step-by-step explanation:
At a coffee shop, the first 100 customers' orders were as follows. Small Medium Large Hot un 48 22 Cold 8 12 5 What is the probability that a customer ordered a small given that he or she ordered a cold drink? Rounded to the nearest percent, [? ]% Enter
Answers
Answer: 32%
Step-by-step explanation:
8/25
The probability that a customer ordered a small given that he or she ordered a cold drink is 32%
How to determine the probability?The probability is represented as:
P(Small | Cold)
This is calculated using:
P(Small | Cold) = n(Small and Cold)/n(Cold)
Using the data on the given table, we have:
P(Small | Cold) = 8/(8 + 12 + 5)
Evaluate
P(Small | Cold) = 0.32
Express as percentage
P(Small | Cold) = 32%
Hence, the probability that a customer ordered a small given that he or she ordered a cold drink is 32%
Read more about probability at:
https://brainly.com/question/25870256
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solve the inequality 0<5x-2<8
Answers
Answer:
×= 2 this is what I got as a result to my equations
5x - 2 < 8 .......... (2)
(1):
0 < 5x - 2
2 < 5x
2/5 < x
x > 2/5
(2):
5x - 2 < 8
5x < 10
x < 2
you have an ant farm with 34 ants. the population of your ants will double every 3 months. the table shows the population growth of the ants over 9 months. decide whether the table represents a linear function or a nonlinear function. after one year how many ants will there be on the farm?
Answers
SOMEONE HELP ME PLEASE!!!!?
Answers
Answer:
139
Step-by-step explanation:
supplementary angles add up to equal 180
so to find the measure of angle ABC we subtract the given angle from 180
180-41=139
so we can conclude that angle ABC= 139
Step-by-step explanation:
< ABC and < CBD are supplementary angles.
< CBD = 41°
< ABC + < CBD = 180° ( Being supplementary angles)
< ABC + 41° = 180°
< ABC = 180° - 41°
< ABC = 139°
Hope it will help :)❤
keiko has bought 36pounds of dog food, she feed the dog 3/4 pound of food each meal. how many meals would this last
Answers
Answer:
48 meals
Step-by-step explanation:
36lbs ÷ 3/4lbs = 48
Baby Zoe drinks a lot of milk. How many gallons are in 20 pints of milk? (1 gallon=4 quarts, 1 quart= 2 pints)
Answers
Answer:
there are 2.5 gallons in 20 pints of milk, or she drinks 2.5 gallons of milk
Step-by-step explanation:
If she drinks 20 pints of milk, you have to convert by dividing.
1 qt= 2 pints
20/2=10
20 pints = 10 quarts
Then, 1 gal = 4 qts
10/4= 2.5
So, there are 2.5 gallons in 20 pints of milk, or she drinks 2.5 gallons of milk.
Hope this helps!!
-Ketifa
(Can I get brainliest?)
Answer:
ehoif :)
Step-by-step explanation:
Find the lengths of the missing side. Round your answer to the nearest tenth
Answers
Answer:
11.2 cm
Step-by-step explanation:
The missing side = the hypotenuse
Apply pythagorean theorem to find he hypotenuse which is given as:
c² = a² + b³
a = 10 cm
b = 5 cm
c = Hypotenuse (missing side)
(Hypotenuse)² = 10² + 5² = 125
Hypotenuse = √125
Hypotenuse = 11.1803399 ≈ 11.2 cm (nearest tenth)
A rectangular prism has a volume of 80 m3. What is the length of the rectangular
base if it has a height of 10 m and width of 2 m?
Answers
Hey there!
The answer is 4 meters, or 4 m.
The formula for volume is lwh, or Length * Width * Height, so we can set up an equation plugging in the values we know:
lwh = V
l(2)(10) = 80
Simplify:
20l = 80
Divide both sides by 20:
l = 4
Have a terrificly amazing day! :)
Andre and Elena knew that after 28 days they would have 228 coins, but they wanted to find out how many coins that actually is. Andre wrote:
228=2⋅28=56
Elena said, “No, exponents mean repeated multiplication. It should be 28⋅28, which works out to be 784.” Do you agree with either of them? Explain your reasoning.
Answers
Answer:
no, exponents are how many times the base is used, it would be 2x2x2... so on until there are 28 2s
Step-by-step explanation:
There are 896 people at the school's basketball game. The
stands are divided into 16 equal sections. If each section
has the same number of people, how many people are in
each section?
Answers
There are 56 people in each section
How to determine the number of people?The given parameters are:
Total = 896
Sections = 16
The number of people per section is
People = Total/Sections
This gives
People = 896/16
Evaluate
People = 56
Hence, there are 56 people in each section
Read more about quotient at:
https://brainly.com/question/629998
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3(2x-6) = 18
What is the answer ? Pls I have 10 minutes to get this finished !!
Answers
Answer:
x = 6
Step-by-step explanation:
3(2x-6) = 18
6x - 18 = 18
6x = 36
x = 6
I NEED HELP NOW THE ASSIGNMENT IS TIMED AND I DON"T HAVE MUCH TIME LEFT HELP PLEASEEEE I WILL GIVE EXTRA POINTS
Thuy is substituting t = 3 and t = 8 to determine if the two expressions are equivalent.
4 (6 t + 1) 24 t + 1
Which statement is true?
Both expressions are equivalent to 73 when t = 3.
Both expressions are equivalent to 76 when t = 3.
Both expressions are equivalent to 193 when t = 8.
The expressions are not equivalent.
Answers
the answer is B) both expressions are equivalent to 76 when t=3
Hope this helps :)
Answer:
D
Step-by-step explanation:
Hope i helped :)
use the distributive to simplify: 3{4x - 10}
Answers
2 1/5 + 1 2/3
explain please, I'm sorry if I'm asking a lot of questions!!
Answers
Answer:
2 1/5 = 11/5 x 3 = 33/ 15
1 2/3 = 5/3 x 5 = 25/ 15
= 33 + 25 = 58/ 15 = 3 13/ 15
:)
Answer: Fraction form: 3 13/15
plz mark me brainliest.
Step-by-step explanation: Fraction form: 3x5=15 so 2/3=10/15 and 1/5=3/15 so 13/15 and 2+1=3 so 3 13/15. plz mark me brainliest
How to mark brainliest:
Tap the crown, if there is no crown reload (there must be 2 answers)