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Gala2k [10]
3 years ago
12

The table shows the volume of water in a tank after it has been filled to a certain height.

Mathematics
1 answer:
Lilit [14]3 years ago
5 0

Functions and tables can be used to model real world situations.

The equation that represents volume is: \mathbf{V(h) = 1.05(h)^3}

From the table, we have:

\mathbf{h \to V}

\mathbf{0 \to 0}

\mathbf{1 \to 1.05}

\mathbf{2 \to 8.40}

\mathbf{3 \to 28.35}

The table can be rewritten as:

\mathbf{h \to V}

\mathbf{0 \to 1.05 \times 0^3}

\mathbf{1 \to 1.05 \times 1^3}

\mathbf{2 \to 1.05 \times 2^3}

\mathbf{3 \to 1.05 \times 3^3}

Replace 0, 1, 2 and 3 with h

\mathbf{h \to 1.05 \times h^3}

The above expression means that:

\mathbf{V(h) = 1.05 \times h^3}

Rewrite as:

\mathbf{V(h) = 1.05(h)^3}

Hence, the equation that represents volume is: \mathbf{V(h) = 1.05(h)^3}

Read more about equations and tables at:

brainly.com/question/19221147

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What are the 5 valid triangle congruence shortcuts
Juliette [100K]

Answer:

SAS, SSS, ASA, AA, HL

Step-by-step explanation:

4 0
4 years ago
2. Solve the equation by completing the square. Show your work.
scoundrel [369]

Answer:

<u>x = 5 or 25</u>

Step-by-step explanation:

I think the method I am about to explain is slightly quicker and easier than the method in your question. This works for any 'complete the square' question.

We begin with x² - 30x = - 125.

First, we are going to factorise the left-hand side of the equation by <u>dividing the 'b' value </u><u>(-30)</u><u> by 2</u> (you'll see why this works in a minute):

(x - 15)²

We want these brackets to multiply out to give x² - 30x, so that they equal the left-hand side of the equation. Unfortunately, if we multiply them out, we get:

(x - 15)(x - 15) =

<u>x² - 30x + 225</u>

There is an <u>unwanted term</u> (the + 225, from 15²)! We only want x² - 30x, so we have to remove this term by <u>subtracting it from the left side of the equation</u>. To do this, let's set up the original equation again:

(x² - 30x + 225) <u>- 225</u> = - 125

<em>Note: </em><em>The reason why we don't have to subtract it from both sides is because the original equation is </em><em>x² - 30x = - 125</em><em>, and so we must make sure the left hand side is still equal to </em><em>x² - 30x</em><em>.</em>

So now we know that (x - 15)² multiplies out to give x² - 30x +225, we can write this as (x - 15)² in our equation:

(x² - 30x + 225) - 225 = - 125

is the same as:

(x - 15)² - 225 = - 125

Now add 225 to <u>both sides</u> of the equation:

(x - 15)² = - 125 + 225 = 100

(x -15)² = 100

The next step is to square root both sides. Be careful here, and remember that √100 can either be 10 or -10, as (-10)² = 100. To indicate both results, write ±10 ("plus or minus 10").

√(x - 15)² = √100

x - 15 = ±10

Because, there are two possible values for the right-hand side of the equation, we need to separate our equation into two equations:

1.     x - 15 = 10

and

2.    x - 15 = -10

Now we solve these two simple linear equations for x:

1.     x = 10 + 15   <- add 15 to both sides

        <u>x = 25</u> This is our first solution.

2.    x = -10 + 15  <- add 15 to both sides again

        <u>x = 5</u> This is our other solution.

<u>So our two solutions are x = 5 and x = 25!</u>

I have attached the quick version of the working out for this question - that is what you would be expected to write down in a test.

5 0
4 years ago
Write a five digit number with an8 that is 10 times the value of the 8 in 48,324​
harina [27]

Answer:

80,000

Step-by-step explanation:

The 8 in the expression = 8,000

If we multiply 8,000 by 10 it would give us 80,000

easy :)

7 0
3 years ago
For all parts of this problem, P(Ā)=0.75 , P(B)=0.3 , and P(B∣A)=0.15
Marianna [84]

12. I assume \bar A denotes the complement of A, so

P(A) = 1 - P(\bar A) = 0.25

Then by definition of conditional probability,

P(B\mid A) = \dfrac{P(A\cap B)}{P(A)} = \dfrac{P(A\cap B)}{0.25} = 0.15 \\\\ \implies \boxed{P(A\cap B) = 0.0375}

13. By inclusion/exclusion,

P(A\cup B) = P(A) + P(B) - P(A\cap B) = 0.25 + 0.3 - 0.0375 \\\\ \implies \boxed{P(A\cup B) = 0.5125}

6 0
2 years ago
Answer quickly please!
LenaWriter [7]
1. D
2. A
3. A

Hope it helps!
8 0
4 years ago
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