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3 years ago

Help please, i really need it because its almost due

Mathematics

2 answers:

Maru [420]3 years ago

6 0

Answer:

Option 3 and Option 4

Step-by-step explanation:

A = pi × r²

r² = A/pi

r² = A × (pi^-1)

r = A^½ × pi^-½

r = A^½ × pi/pi^½

nata0808 [166]3 years ago

3 0

Answer:

D sqrt( A ) sqrt(pi) / pi = r

Step-by-step explanation:

The area of a circle is given by

A = pi r^2

To find r

Divide each side of the equation by pi

A / pi = pi r^2 /pi

A / pi = r^2

Take the square root of each side

sqrt(A / pi )= sqrt( r^2)

sqrt(A / pi )= r

We do not like leaving square roots in the denominator, so multiply by sqrt(pi)/sqrt(pi))

sqrt(A / pi ) *sqrt(pi)/sqrt(pi))

sqrt( A ) sqrt(pi) / pi = r

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Xelga [282]

The denominator cannot be zero, so

$e^x - 9 = 0 \implies e^x = 9 \implies x = \ln(9)$

is not in the domain of $f(x)$ .

$\ln(x)$ is defined only for $x>0$ , and we have

$\ln(x+1) > 0 \implies e^{\ln(x+1)} > e^0 \implies x+1 > 1 \implies x>0$

so there is no issue here.

By the same token, we need to have

$x+1 > 0 \implies x > -1$

Taking all the exclusions together, we find the domain of $f(x)$ is the set

$\left\{ x \in \Bbb R \mid x > 0 \text{ and } x \neq \ln(9)\right\}$

or equivalently, the interval $(0,\ln(9))\cup(\ln(9),\infty)$ .

3 0

1 year ago

Simplify: (1/2)^4 <br><br> please solve this problem

dsp73

Answer:

-1/16

Step-by-step explanation:

5 0

3 years ago

Find the area of quadrilateral ABCD with vertices A(0, 4), B(4, 1), C(1, -3), and D(-3, 0).

Ivenika [448]

Answer:

To find area of the quadrilateral ABCD, now we have take the vertices A(x1, y1), B(x2, y2), C(x3, y3) and D(x4, y4) of the quadrilateral ABCD in order (counter clockwise direction) and write them column-wise as shown below. Add the diagonal products x1y2, x2y3, x3y4 and x4y1 are shown in the dark arrows.

Step-by-step explanation:

4 0

2 years ago

Write an equation of a line in slope intercept form that is parallel to y = -3x+9 and passes through the point (-2,-5)

GuDViN [60]

Answer:

hi, bye

Step-by-step explanation:

Thx for the free points! ;)

4 0

2 years ago

6 mariana sells bags of bird food.

Aliun [14]

Percentage of the weight of seeds in each bag that mariana sold last week is 10.4%.

<h3>Percentage of the weight of seeds</h3>

First step

Weight of seed and nuts last week=12/5×9

Weight of seed and nuts last week=21.6kg

Second step

Percentage of the weight of seeds=21.6 kg-19.35kg/21.6kg

Percentage of the weight of seeds=2.25kg/21.6kg

Percentage of the weight of seeds=0.104×100

Percentage of the weight of seeds=10.4%

Therefore the Percentage of the weight of seeds in each bag that mariana sold last week is 10.4%.

Learn more about percentage here:brainly.com/question/24304697

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8 0

2 years ago