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3 years ago

Help please I’ll give brainliest

Mathematics

1 answer:

Luden [163]3 years ago

3 0

I don't see any question there ... just a bunch of pretty rulers.

I'm going out on a limb here, and I'm gonna assume that the question is "Identify the number to which the arrow on each ruler is pointing.".

If that's the question, you're welcome. If not, ignore everything I'm about to say.

Orphan ruler on page-1: 6 and 1/4

Rulers on page-2, starting at the top and working down:

6 and 3/8

3 and 5/8

2 and 1/2

7 and 3/4

4 and 7/8

5 and 1/8

9 and 1/2 .

If these answers are not helpful, remember: I'm the one who had to invent the question, and for the question that I invented, these answers are all correct !

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SOMEBODY HELP ME IM DESPERATE

garik1379 [7]

I believe it is the commutative property of multiplication. Commutative property is you can put the numbers in any order and it will have the same end result. I got multiplication because it is multiplication.

Hope this helps!

4 0

3 years ago

Read 2 more answers

25ft+25ft+20ft+20ft+2.5ft+2.5ft+8ft+13ft

Anna71 [15]

we are given

$25ft+25ft+20ft+20ft+2.5ft+2.5ft+8ft+13ft$

Since, every value is in ft

so, we can take out ft

$=(25+25+20+20+2.5+2.5+8+13)ft$

now, we can add them

and we get

$=116ft$ ............Answer

7 0

3 years ago

During optimal conditions, the rate of change of the population of a certain organism is proportional to the population at time

Lana71 [14]

Answer:

The population is of 500 after 10.22 hours.

Step-by-step explanation:

The rate of change of the population of a certain organism is proportional to the population at time t, in hours.

This means that the population can be modeled by the following differential equation:

$\frac{dP}{dt} = Pr$

In which r is the growth rate.

Solving by separation of variables, then integrating both sides, we have that:

$\frac{dP}{P} = r dt$

$\int \frac{dP}{P} = \int r dt$

$\ln{P} = rt + K$

Applying the exponential to both sides:

$P(t) = Ke^{rt}$

In which K is the initial population.

At time t = 0 hours, the population is 300.

This means that K = 300. So

$P(t) = 300e^{rt}$

At time t = 24 hours, the population is 1000.

This means that P(24) = 1000. We use this to find the growth rate. So

$P(t) = 300e^{rt}$

$1000 = 300e^{24r}$

$e^{24r} = \frac{1000}{300}$

$e^{24r} = \frac{10}{3}$

$\ln{e^{24r}} = \ln{\frac{10}{3}}$

$24r = \ln{\frac{10}{3}}$

$r = \frac{\ln{\frac{10}{3}}}{24}$

$r = 0.05$

$P(t) = 300e^{0.05t}$

At what time t is the population 500?

This is t for which P(t) = 500. So

$P(t) = 300e^{0.05t}$

$500 = 300e^{0.05t}$

$e^{0.05t} = \frac{500}{300}$

$e^{0.05t} = \frac{5}{3}$

$\ln{e^{0.05t}} = \ln{\frac{5}{3}}$

$0.05t = \ln{\frac{5}{3}}$

$t = \frac{\ln{\frac{5}{3}}}{0.05}$

$t = 10.22$

The population is of 500 after 10.22 hours.

7 0

2 years ago

How to do: 4(x+7)=2(x+7)

andre [41]

4(x+7) becomes 4x+28 you multipli the 4 in parentheses ans 2(x+7) becomes 2x+14

4x+28=2x+14 you move the x termes to the left and other numbers to the right look:

4x-2x=14-28 when you change the sides always change the sign +or-
2x=-14
2x/2=-14/2
X=-7

3 0

3 years ago

Read 2 more answers

Dale is standing 2x+7 feet from the base of a tower, the tower is 8x-4 feet tall. What is the distance between dale and the top

V125BC [204]

Answer:

6x - 11 feet

Step-by-step explanation:

Dale is standing (2x + 7) feet height from the base of the tower.

And the tower is given to be (8x - 4)feet tall.

We have to find the distance between Dale and the top of the tower.

Now, the distance between dale and the top of the tower = height of the tower - height of Dale = (8x - 4) - (2x + 7) = (6x - 11) feet. (Answer)

4 0

2 years ago