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
olga_2 [115]
3 years ago
7

What is ratio of 28 red pens and 84 black pens

Mathematics
2 answers:
Setler [38]3 years ago
8 0
Ratio

28:84

If you want it simplified
it would be
1:3<span />
xenn [34]3 years ago
8 0
1 red pen for every 3 black pens
You might be interested in
The half-life of iron-52 is approximately 8.3 hours.How much of a 13 gram sample of iron-52 would remain after 8 hours? Round to
Alexandra [31]

6.665 grams of the 13 grams remain after 8 hours.

<h3>How much of a 13 gram sample of iron-52 would remain after 8 hours?</h3>

The decay equation for the 13 grams of iron-52 is:

N(t) = 13g*e^{(-ln(2)/8.3h)*t}}

Where N is the amount of iron-52, and t is the time in years.

Where we used the fact that the half-life is exactly 8.3 hours.

Now, the amount that is left is given by N(8h), so we just need to replace the variable t by by 8 hours, so we get:

N(8h) = 13g*e^{(-ln(2)/8.3h)*8h}} = 6.665g

So 6.665 grams of the 13 grams remain after 8 hours.

If you want to learn more about half-life:

brainly.com/question/11152793

#SPJ1

5 0
2 years ago
A synthetic fiber used in manufacturing carpet has tensile strength that is normally distributed with mean 75.5 psi and standard
Sedaia [141]

Answer:

The standard deviation reduces when sample size (n) increases

Step-by-step explanation:

From the above information given, we have that mean = 75.5

Standard deviation = 3.5

But Standard deviation = √summation (x-u)/n

This simply implies that when sample (n) is increased there would be a reduction in the standard deviate.

7 0
3 years ago
What is the value of x?<br><br><br><br> Enter your answer in the box.
Shkiper50 [21]

Step-by-step explanation:

114° thats what i got when i calculated

8 0
3 years ago
Read 2 more answers
Based on FAA estimates the average age of the fleets of the 10 largest U.S. commercial passenger carriers is 13.4 years with a s
Aliun [14]

Answer : 0.0129

Step-by-step explanation:

Given : Based on FAA estimates the average age of the fleets of the 10 largest U.S. commercial passenger carriers is \mu=13.4 years and standard deviation is \sigma=1.7 years.

Sample size : n=40

Let X be the random variable that represents the age of fleets.

We assume that the ages of the fleets of the 10 largest U.S. commercial passenger carriers are normally distributed.

For z-score,

z=\dfrac{x-\mu}{\dfrac{\sigma}{\sqrt{n}}}

For x=14

z=\dfrac{14-13.4}{\dfrac{1.7}{\sqrt{40}}}\approx2.23

By using the standard normal distribution table , the probability that the average age of these 40 airplanes is at least 14 years old will be :-

P(x\geq 14)=P(z\geq2.23)\\\\=1-P(z

Hence, the required probability = 0.0129

6 0
3 years ago
PLEASE HELP!!!!!!
Fofino [41]
It is 0.088 this is just for the 20 characters so dont read this fhehfhryhfrhuehhfuyrhuyhfhefheufrhfyer
4 0
3 years ago
Other questions:
  • What is the result of the following division?
    15·2 answers
  • A standard number cube is rolled 288 times. Predict how many times a 3 or a 5 will be the result.
    5·1 answer
  • Find the perimeter of the rectangle whose lenth is 24cm and diagonal is 25cm​
    14·1 answer
  • Find the perimeter of the triangle to the nearest unit with vertices A(-2,4) B(-2,-2) and C(4,-2) ​
    7·1 answer
  • 1. A restaurant has 10 tables.
    9·2 answers
  • At the local ice cream shop, there
    6·1 answer
  • Brainlest for correct awnser :D
    12·1 answer
  • Help please! this ones easy i just dont know how to do it
    7·1 answer
  • PLEASE HELP ME WITH THIS KHAN ASAP ITS NOT THAT HARD IM JUST TIRED
    11·2 answers
  • Arron is getting new carpet in his bedroom. The dimensions of his room are 8 feet by 15 feet. How much carpet does he need to co
    5·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!