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3 years ago

The histogram below shows the estimated monthly salaries of company employees with different years of experience.

Mathematics

1 answer:

docker41 [41]3 years ago

8 0

The correct answer is A. The scale on the y-axis overemphasizes the difference in salaries between different experience levels.

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Svetllana [295]

Answer:

yes

Step-by-step explanation:

...

3 0

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 assum

Ivan

Answer:

Differential equation

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

Solution

$y=\frac{1}{1+4e^{-0.327t}}$

Value of constant k=0.327 days^(-1)

The rumor reaches 80% at 8.48 days.

Step-by-step explanation:

We know

y(t): proportion of people that heard the rumor

y'(t)=ky(1-y), rate of spread of the rumor

Differential equation

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

Solving the differential equation

$\frac{dy}{y(1-y)}=k\cdot dt \\\\\int \frac{dx}{y(1-y)} =k \int dt \\\\-ln(1-\frac{1}{y} )+C_0=kt\\\\1-\frac{1}{y} =Ce^{-kt}\\\\\frac{1}{y} =1-Ce^{-kt}\\\\y=\frac{1}{1-Ce^{-kt}}$

Initial conditions:

$y(0)=0.2\\y(3)=0.4\\\\y(0)=0.2=\frac{1}{1-Ce^0}\\\\1-C=1/0.2\\\\C=1-1/0.2= -4\\\\\\y(3)=0.4=\frac{1}{1+4e^{-3k}} \\\\1+4e^{-3k}=1/0.4\\\\e^{-3k}=(2.5-1)/4=0.375\\\\k=ln(0.375)/(-3)=0.327\\\\\\y=\frac{1}{1+4e^{-0.327t}}$

Value of constant k=0.327 days^(-1)

At what time the rumor reaches 80%?

$y(t)=0.8=\frac{1}{1+4e^{-0.327t}} \\\\1+4e^{-0.327t}=1/0.8=1.25\\\\e^{-0.327t}=(1.25-1)/4=0.0625\\\\t=ln(0.0625)/(-0.327)=8.48$

The rumor reaches 80% at 8.48 days.

8 0

3 years ago

HELP, EXTRA POINTS AND BRAINIEST UMM DONT GUESS AND "NO NO NOOO LINKS" ty

3241004551 [841]

Answer:

236.3 feet squared.

Step-by-step explanation:

Base Surface Area = 8 squared

= 64 feet squared

Lateral Surface Area =

2×8× √

( 8 )2 + 102

= 172.3 feet sqaured

Total Surface Area = 236.3 feet squared

Please brainliest! I worked so hard!

7 0

3 years ago

Hi can someone help me with this pleaseee

AveGali [126]

Second choice.

Which is 1591.1 cm^2.

3 0

3 years ago

You deposit $800 in an account that earns simple interest at an annual rate of 5%.

S_A_V [24]

Step-by-step explanation:

$800 × 5% = $40

for 1 year, I earn $40

100 ÷ 40 = 2 remainder 2

Therefore I would have to leave the money in for at least 3 years to earn $100

7 0

4 years ago

Read 2 more answers