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3 years ago

Pls answer ASAP this is timed and don’t put a link

Mathematics

1 answer:

Serjik [45]3 years ago

8 0

Answer:

C: mean 6.5 median 6

Step-by-step explanation:

median you find middle number in sorted numbers lined up. mean is all numbers added up and divided by how many there are

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What scale factor is applied to shape b to make shape a? I need help asap please

OverLord2011 [107]

Answer:

For shape B to make shape A all numbers in shape B would have to be divided by 1.5

Step-by-step explanation:

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3 years ago

A consultant wants to ask workers at a factory about the workers job satisfaction. Which of the following best describe a system

alexandr1967 [171]

SOLUTION

Given the question in the image, the following are the solution steps to answer the question.

STEP 1: Define systemmatic sampling

Systematic sampling is a type of probability sampling method in which sample members from a larger population are selected according to a random starting point but with a fixed, periodic interval. This interval, called the sampling interval, is calculated by dividing the population size by the desired sample size

STEP 2: Determine the answer

The option that follows the systematic sample of workers is the last option because it follows a fixed, periodic interval of "every 4th worker until 80 workers are selected".

Hence, the answer is:

The consultant takes a list of the workers and selects every 4th worker until 80 workers are selected.

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1 year ago

I need help can someone pls help me I need to get this right for my test :((!

Aliun [14]

<h3>y = x + 20</h3><h3></h3><h3><em>Please let me know if I am wrong.</em></h3>

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2 years ago

What mistake did Fumio make? He did not distribute the 2 to both components of vector u. He added vectors v and w before distrib

chubhunter [2.5K]

Answer: A

Step-by-step explanation:

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3 years ago

A rumor spreads through a small town. Let y(t) be the fraction of the population that has heard the rumor at time t and assume t

sladkih [1.3K]

Answer:

The answer is shown below

Step-by-step explanation:

Let y(t) be the fraction of the population that has heard the rumor at time t and assume that the rate at which the rumor spreads is proportional to the product of the fraction y of the population that has heard the rumor and the fraction 1−y that has not yet heard the rumor.

$\frac{dy}{dt}\ \alpha\ y(1-y)$

$\frac{dy}{dt}=ky(1-y)$

where k is the constant of proportionality, dy/dt = rate at which the rumor spreads

$\frac{dy}{dt}=ky(1-y)\\\frac{dy}{y(1-y)}=kdt\\\int\limits {\frac{dy}{y(1-y)}} \, =\int\limit {kdt}\\\int\limits {\frac{dy}{y}} +\int\limits {\frac{dy}{1-y}} =\int\limit {kdt}\\\\ln(y)-ln(1-y)=kt+c\\ln(\frac{y}{1-y}) =kt+c\\taking \ exponential \ of\ both \ sides\\\frac{y}{1-y} =e^{kt+c}\\\frac{y}{1-y} =e^{kt}e^c\\let\ A=e^c\\\frac{y}{1-y} =Ae^{kt}\\y=(1-y)Ae^{kt}\\y=\frac{Ae^{kt}}{1+Ae^{kt}} \\at \ t=0,y=10\%\\0.1=\frac{Ae^{k*0}}{1+Ae^{k*0}} \\0.1=\frac{A}{1+A} \\A=\frac{1}{9} \\$

$y=\frac{\frac{1}{9} e^{kt}}{1+\frac{1}{9} e^{kt}}\\y=\frac{1}{1+9e^{-kt}}$

At t = 2, y = 40% = 0.4

c) At y = 75% = 0.75

$y=\frac{1}{1+9e^{-0.8959t}}\\0.75=\frac{1}{1+9e^{-0.8959t}}\\t=3.68\ days$

5 0

3 years ago