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3 years ago

Please help this is hard

Mathematics

2 answers:

jarptica [38.1K]3 years ago

8 0

Step-by-step explanation:

$\sqrt{100} = 10 \\ \sqrt{4} = 2 \\ \sqrt{64} = 8 \\ \sqrt{16} = 4 \\ \sqrt{25} = 5 \\ \sqrt{1} = 1 \\ \sqrt{49} = 7 \\ \sqrt{36} = 6$

OverLord2011 [107]3 years ago

3 0

Answer:

1 - 10

2 - 2

3 - 8

4 - 4

5 - 5

6 - 1/2

7 - 7

8 - 6

Step-by-step explanation:

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a circular oil slick is expanding at a rate of 2m^2/h. Find the rate at which it's diameter is expanding when it's radius is 1.5

aleksandrvk [35]

Answer: $\frac{4\pi}{3} \text{ meter per hour}$

Step-by-step explanation:

The circular oil slick is expanding at a rate of $2 m^2/h$

Let A be the area of the circular oil slick,

So, the changes in A with respect to time (t),

$\frac{dA}{dt} = 2$

$\frac{d(\pi r^2)}{dt} = 2$

$2\pi r\frac{dr}{dt} = 2$

$\frac{dr}{dt} = \frac{1}{\pi r}$

Also, the change in diameter with respect to time(t),

$\frac{d}{dt} (2 r) = 2 \frac{dr}{dt}$

$\frac{d}{dt} (2 r) = 2 \times \frac{1}{\pi r}$

$\frac{d}{dt} (2 r) = \frac{2}{\pi r}$

For r = 1.5 m,

$\frac{d}{dt} ( 2 r)]_{r=1.5} = \frac{2}{\pi \times 1.5}=\frac{20}{\pi \times 15}=\frac{4\pi }{3}\text{ meter per hour}$

7 0

3 years ago

A rectangle field is five times as long as it is wide. If the perimeter of the field is 288 yards, what are the field's dimensio

mr_godi [17]

$x + x + 5x + 5x = 288 \\ 12x = 288 \\ x = 24$

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Area =
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Hope this helps. - M

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3 years ago

A phone company charges $.25 for the first minute of a long distance call and $.07 for each addition minute. write an equation t

Mamont248 [21]

The cost C of a long distance call as a function of the length t is C(t) = 0.25 + 0.07t and the number of minutes is 25 minutes

<h3>What are linear equations?</h3>

Linear equations are equations that have constant average rates of change. Note that the constant average rates of change can also be regarded as the slope or the gradient

<h3>How to determine the solution to the system?</h3>

A system of linear equations is a collection of at least two linear equations.

In this case, the given parameters are:

Charge for first minute = $.25

Rate for additional minute = $.07 per minute

Let the number of minutes be t and the total cost be C(t)

So, we have:

C(t) = Charge for first minute + Rate for additional minute * x

This gives

C(t) = 0.25 + 0.07t

When the total cost is $2, the equation becomes

0.25 + 0.07t = 2

Subtract 0.25 from both sides

0.07t = 1.75

Divide both sides by 0.07

t = 1.75/0.07

Evaluate the quotient

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Read more about linear equations at:

brainly.com/question/14323743

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1 year ago

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Julli [10]

Answer:

Would it be 1?

Step-by-step explanation:

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3 years ago

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Marianna [84]

Answer:

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Step-by-step explanation:

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3 years ago

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