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3 years ago

The radius of a circle is 4 inches. What is the circle's area? p=4 in Use 3.14 for T.

Mathematics

2 answers:

aivan3 [116]3 years ago

6 0

Answer:

50.27

Step-by-step explanation:

matrenka [14]3 years ago

5 0

Answer:

50.24

Step-by-step explanation:

$r = 4 \\ \pi = 3.14 \\ area = \pi {r}^{2}$

Input the values into the equation

$3.14 \times {4}^{2} \\ = 3.14 \times 16 \\ = 50.24$

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someone please help, write in point-slope form an equation of the line that passes through the point (8, 9) with slope 7.

Bess [88]

Answer:

y=7x-47

Step-by-step explanation:

$(8, 9) = (x_1,y_1) \\ m = 7 \\ y - y_1 = m(x - x _1) \\ y - 9 = 7(x - 8)$

$y - 9 = 7x - 56 \\ y = 7x - 56 + 9 \\ y = 7x - 47$

7 0

3 years ago

sin x = -1/2, and the cos y = √3/2. if angle x is in the fourth quadrant and angle y is in the first quadrant, the value of cos(

skad [1K]

Answer:

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Step-by-step explanation:

5 0

3 years ago

Read 2 more answers

Suppose u and v are functions of x that are differentiable at x=0 and that u(0)= 7,u'(0)=-5,v(0)= -1, v'(0)= -4.

andriy [413]

This question is incomplete, the complete question is;

Suppose u and v are functions of x that are differentiable at x=0

and that { u(0) = 7, u'(0) = -5 } { v(0)= -1, v'(0) = -4 }

Find the values of the following derivatives at x = 0.

a) $\frac{d}{dx}$ ( uv )

b) $\frac{d}{dx}$ ( $\frac{u}{v}$ )

c) $\frac{d}{dx}$ ( $\frac{v}{u}$ )

Answer:

a) $\frac{d}{dx}$ ( uv ) = -23

b) $\frac{d}{dx}$ ( $\frac{u}{v}$ ) = 33

c) $\frac{d}{dx}$ ( $\frac{v}{u}$ ) = -32/49 or - 0.6531

Step-by-step explanation:

Given that;

{ u(0) = 7, u'(0) = -5 } { v(0)= -1, v'(0) = -4 }

$\frac{d}{dx}$ ( uv )

we differentiate

$\frac{d}{dx}$ ( uv ) = uv' + vu'

at x = (0), we substitute our values

$\frac{d}{dx}$ ( uv ) = ( 7 × -4 ) + ( -1 × -5)

$\frac{d}{dx}$ ( uv ) = -28 + 5

$\frac{d}{dx}$ ( uv ) = -23

$\frac{d}{dx}$ ( $\frac{u}{v}$ )

we differentiate

$\frac{d}{dx}$ ( $\frac{u}{v}$ ) = ( vu' - uv' ) / v²

at x=0, we substitute our values

$\frac{d}{dx}$ ( $\frac{u}{v}$ ) = ( (-1 × -5) - (7 × -4 ) ) / (-1)²

$\frac{d}{dx}$ ( $\frac{u}{v}$ ) = (( 5 - ( -28 )) / 1

$\frac{d}{dx}$ ( $\frac{u}{v}$ ) = 33 / 1

$\frac{d}{dx}$ ( $\frac{u}{v}$ ) = 33

c) $\frac{d}{dx}$ ( $\frac{v}{u}$ )

we differentiate

$\frac{d}{dx}$ ( $\frac{v}{u}$ ) = ( uv' - vu' ) / u²

at x=0, we substitute our values

$\frac{d}{dx}$ ( $\frac{v}{u}$ ) = ( (7 × -4) - (-1 × -4) ) / (7)²

$\frac{d}{dx}$ ( $\frac{v}{u}$ ) = ( -28 - ( 4 ) ) / 49

$\frac{d}{dx}$ ( $\frac{v}{u}$ ) = ( -28 - 4 ) /49

$\frac{d}{dx}$ ( $\frac{v}{u}$ ) = -32 / 49

$\frac{d}{dx}$ ( $\frac{v}{u}$ ) = -32/49 or - 0.6531

6 0

3 years ago

3x + y =11 and 6x + 3y = 24 solved by elimination

Svetradugi [14.3K]

Y=2 x=3 double check is at bottom but cut off

4 0

3 years ago

Which professionals most directly use geometry in their work?

S_A_V [24]

Answer:

Astronomers.

Step-by-step explanation:

In many, many ways we can use geometry in astronomy. One of the most or important example is that when astronomers find the distance between the different celestial bodies and they also find the tilt of any planet they uses geometry .

And in this field other uses of geometry when planets orbiting around the sun or satellites orbiting around there planets astronomers uses geometry to find the speed and velocity of the planets.

6 0

3 years ago