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3 years ago

What is the surface area?

Mathematics

1 answer:

Strike441 [17]3 years ago

7 0

Answer:

about 628.32

Step-by-step explanation:

use the following formula:

$\pi \times r(r + \sqrt{ {h}^{2} + {r}^{2} } )$

plug in the given values

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What is the answer for this one?

lapo4ka [179]

Answer:

<em>Option B</em>

Step-by-step explanation:

We can approach this problem through the formula for distance between points, but I can think of a more easier approach. This line forms a triangle with the x and y axis, a right triangle with the legs being 2 and 1 units. The line with which we must find the distance of acts as the hypotenuse of this triangle, so let us apply Pythagorean Theorem to solve for the length of the line;

$a^2 + b^2 = c^2,\\( 1 )^2 + ( 2 )^2 = c^2,\\\\1 + 4 = c^2,\\c^2 = 5,\\\\c = ( About ) 2.2$

<em>Solution; Option B</em>

7 0

4 years ago

BRAINLIESTTTTT!!!!

Debora [2.8K]

Hi!

Samuel bought the mixer for $54,205. The value of this (the prive) decreases every year at a costant rate (so, for example, it may decrease of $100 every year).

we are solving for t and we should keep in mind that we multiply the price for the function (1 - rate/100)^time

in f(t) you put the value of year 1 for example

$f(t) = 54205(1- \frac{value1-value2}{value1}) ^t$

Solving for r will bring us to the solution, and we can substitute 1 to t since we are calculating how much it decreases after ONE year.

We would divide for 54205 to cancel out that 54205 multiplicating the parenthesis.

Also, the x is given by the formula (vale2-value1)/value1 to see how much the price changes from year 1 to year 2

We will get $f(t) = 54205(\frac{(47000-41000)}{47000}) ^1$

Again, it would be:

f(t) = 54205(0.13)^1

7 0

4 years ago

Read 2 more answers

Solve x2 + 4x – 4 = 0

Damm [24]

Answer:

Quadratic Equations! Yes!

Step-by-step explanation:

Now, there are three methods to solving this:

1.Quadratic Formula

2.Factoring

3. Completing the square

Now, Based on the answers, I think it would be better if we used Quadratic Formula, as you cannot get the answer easily with factoring, and I'm a bit rusty on completing the square.

So, Quadratic Formula! To solve it using this method, we have to find x using this: $x=\frac{-b+-\sqrt{b^{2} -4ac} }{2a}$ (the +- before the square root means it could be both positive or negative)

Where a, b are coefficients and c is a term(in a quadratic equation form: $ax^{2} +bx+c=0$ )

So, we just have to input the stuff from our equation into the formula!

$x=\frac{-4+-\sqrt{32} }{2}$

Now, we can simplify the square root of 32 into 4 times the square root of 2

$x=\frac{-4+-4\sqrt{2} }{2}$

And, we can divide 2 from it all!

$x=-2+-2\sqrt{2}$

So, there you have it! The Answer is C, or 3.

Hope this helps!

4 0

3 years ago

The movie theater donated 648 tickets to 9 schools. If the movie theater donated the same number of the tickets to each school,h

zimovet [89]

Each school would receive 72 tickets

648 tickets / 9 schools

648 / 9 = 72

3 0

4 years ago

I don't know how to do this

Dvinal [7]

$a_1=2;\ r=-\dfrac{3}{2}\\\\a_2=a_1r\to a_2=2\cdot\left(-\dfrac{3}{2}\right)=-3\\\\a_3=a_2r\to a_3=-3\cdot\left(-\dfrac{3}{2}\right)=\dfrac{9}{2}\\\\a_4=a_3r\to a_4=\dfrac{9}{2}\cdot\left(-\dfrac{3}{2}\right)=-\dfrac{27}{4}\\\\a_5=a_4r\to a_5=-\dfrac{27}{4}\cdot\left(-\dfrac{3}{2}\right)=\dfrac{81}{8}$

3 0

4 years ago