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3 years ago

Do the ratios 4:18 and 2:9 form a proportion? yes no

Mathematics

1 answer:

Triss [41]3 years ago

6 0

Answer:

Yes. A propotion is to check if two things are equivelent. The ratios 4:18 and 2:9 are equivelent.

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2. If the present salary of an employee is $36,500 and they are to receive a 7% raise next year, what will be the new salary?

Natasha_Volkova [10]

Answer:

hello ! you multiply $36,500 by 7% and you get $25,550. add this amount to the original amount and you get $62,050.

6 0

2 years ago

The population of a community is known to increase at a rate proportional to the number of people present at time t. If the popu

Lady bird [3.3K]

Answer:

$P(t) = P(0)e^{0.0693t}$

Step-by-step explanation:

The population of a community is known to increase at a rate proportional to the number of people present at time t.

This means that the population growth is modeled by the following differential equation:

$\frac{dP(t)}{dt} = rP(t)$

Which has the following solution:

$P(t) = P(0)e^{rt}$

In which P(t) is the population after t years, P(0) is the initial population and r is the growth rate.

The population has doubled in 10 years

This means that $P(10) = 2P(0)$ . We use this to find r.

$P(t) = P(0)e^{rt}$

$2P(0) = P(0)e^{10r}$

$e^{10r} = 2$

$\ln{e^{10r}} = \ln{2}$

$10r = \ln{2}$

$r = \frac{\ln{2}}{10}$

$r = 0.0693$

So the equation that will estimate the population of the community in t years is:

$P(t) = P(0)e^{0.0693t}$

6 0

3 years ago

46 degrees and x <br><br> X =

vesna_86 [32]

Answer:

136° that's 90 plus 46.........

3 0

2 years ago

Read 2 more answers

Hai, I need help ;)

STatiana [176]

Step-by-step explanation:

Some expressions that are equivalent to this is: 1 - 1/5; 2 - 1 1/5; 3 - 2 1/5; etc.

4 0

2 years ago

Read 2 more answers

Determlne the circumference of a circle with a radius of 8 meters.

ollegr [7]

Answer:

The first one

Step-by-step explanation:

answer = 50.2

6 0

2 years ago

Read 2 more answers