1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
Leya [2.2K]
3 years ago
13

a rectangle has a length 8 cm the rectangle has area 20cm^2 the length of the rectangle is increased by 2 cm the area of the rec

tangle is increased by 4 cm^2 noh says the width of the rectangle decreased less than 5% is noah correct
Mathematics
1 answer:
Daniel [21]3 years ago
7 0

9514 1404 393

Answer:

  yes

Step-by-step explanation:

The width of the rectangle is given by ...

  W = A/L

  W = (20 cm²)/(8 cm) = 2.5 cm

__

The modified rectangle has a length of (8 cm +2 cm) = 10 cm, and an area of (20 cm² +4 cm²) = 24 cm². Its width will be ...

  W = (24 cm²)/(10 cm) = 2.4 cm

The percentage change in size is ...

  ((2.4 cm)/(2.5 cm) -1) × 100% = -4%

The width of the rectangle decreased less than 5%. Noah is correct.

You might be interested in
George believes the Art Club students at his school have an unfair advantage in being assigned to the art class they request. He
krek1111 [17]

Answer:

I think that they all have fairness in the class assignment process.

I think this because of the way that more people take art club than art class,

Step-by-step explanation:

8 0
4 years ago
Read 2 more answers
What is the radius of the circle in the example?<br> 3 cm<br> 5 cm<br> 7 cm
Strike441 [17]

Answer:

5

Step-by-step explanation:

3 0
4 years ago
Which expression is equivalent to (x^4/3 x^2/3)^1/3
Oksanka [162]

Answer:

X^2/3

Step-by-step explanation:

6 0
3 years ago
Scores of an IQ test have a bell-shaped distribution with a mean of 100 and a standard deviation of 12. Use the empirical rule t
MissTica

Answer:

A) 99.7% of people have an IQ between 64 and 136.

B) 5% of people have an IQ score less than 76 or greater than 124.

C) 16% of people have an IQ score greater than 112.

Step-by-step explanation:

The Empirical Rule tells us that, in a normal or 'bell-shaped' distribution, 68% of the data is one standard deviation from the mean, 95% of the data is two standard deviations from the mean, and 99.7% of the data is three standard deviations from the mean.

A) 64 and 136 are 3 standard deviations away from the mean, so 99.7% of people have an IQ between 64 and 136.

B) 76 and 124 are 2 standard devations away from the mean, but the answer is asking what percentage is not between them. 100% - 95% gives us 5%.

C) 112 is one standard deviation away from the mean. If we want to find the percentage greater, then we can do 100% - 50% (as 112 is to the left of the mean), then we can take half of 68 to get 34%, and after subtracting 50% and 34% from the 100%, we get 16%.

8 0
3 years ago
Alan and Brian share a sum of money in the ratio 1 : 4.What fraction of the money does Alan receive?
Naya [18.7K]

Answer:

1/4 of total money

Step-by-step explanation:

pls mark brainliest

5 0
3 years ago
Read 2 more answers
Other questions:
  • HELP ASAP PLEASEEEEEE
    9·1 answer
  • Why do you have to show work for math
    7·2 answers
  • The measure of an exterior angle of a regular polygon is 15 degrees. What is the sum of the measures of the interior angles of t
    15·2 answers
  • Put answer in coordinate form: 2x - 3y = 12 and x + 3y = 6
    6·1 answer
  • 5÷ 3/4= what is the right answer
    14·2 answers
  • →
    5·1 answer
  • the absolute value of a number is the distance from 0 to the number on a number line. use absolute value notation to indicate tw
    9·1 answer
  • Determine whether the equation has no solution, one solution, or infinitely many solutions. -2(11-12x)=-4(1-6x)
    6·1 answer
  • HELP ASAP
    11·1 answer
  • Can someone please help me out with 15 and 16
    8·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!