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3 years ago

Please answer this question for brainliest!

Mathematics

2 answers:

natta225 [31]3 years ago

7 0

D d d d d d d d d d

-BARSIC- [3]3 years ago

3 0

The answer is d because the triangles have a scale ratio of 1:2, meaning that the side ratio is 5.1 : CD. With this ration, you get x = 10.2 cm

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lianna [129]

Answer:

The Answer is B

Step-by-step explanation:

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3 years ago

A recipe for 12 baked chocolate chip cookies calls for 2 cups of flour to 0.75 cups of semi-sweet chocolate chips. What is the r

UNO [17]

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3 years ago

A weight suspended by a spring vibrates vertically according to the function D D given by D(t)=2sin(4π(t+18)) D ( t ) = 2 sin (

STALIN [3.7K]

Answer:

21.75 cm/s

Step-by-step explanation:

1 cm above central position means D = 1, so we plug in 1 into D(t) and find the time and which this occurs.

$D(t)=2Sin (4\pi(t+18))\\1=2Sin (4\pi(t+18))\\\frac{1}{2}=Sin(4\pi t +72\pi)\\4\pi t + 72 \pi = \frac{\pi}{6}\\4\pi t = \frac{\pi}{6}-72\pi\\t=\frac{\frac{\pi}{6}-72\pi}{4\pi}$

This is the time at which this occurs.

To find instantaneous rate of change, we differentiate D(t) and plug in this t we found. Remembering that d/dt (Sin t) = Cos t

$D(t)=2Sin (4\pi(t+18))\\D(t)=2Sin(4\pi t + 72\pi)\\D'(t)=2Cos(4\pi t + 72\pi)(4\pi)$

Now putting t:

$D'(t)=2Cos(4\pi t + 72\pi)(4\pi)\\D'(\frac{\frac{\pi}{6}-72\pi}{4\pi})=2Cos(4\pi (\frac{\frac{\pi}{6}-72\pi}{4\pi}) + 72\pi)(4\pi)\\=8\pi Cos(\frac{\pi}{6})\\=21.75$

Thus, the instantaneous rate would be around 21.75 cm/s

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3 years ago

The diameter of a circle is 7m. Find its area in terms of pie(urgent plz help)

wolverine [178]

Answer:

12.25 pi

Step-by-step explanation:

radius=3.5

area=pi(r^2)

12.25pi

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4 years ago

the sum of the ages of chukwu and Caroline is 45 years if the difference in their age is 3 years find the age of chukwu (chukwu

sladkih [1.3K]

Step-by-step explanation:

let,the sum of the ages of chukwu & Caroline be X & Y.

now,

X+y=45

X-y=3

(+) (+) (-)

__________

2x=42

or,X=42/2

or,X=21

putting the value of X,

X+y=45

or, 21+y=45

or,y=45-21

or,y=24

therefore,X=21

y=24

6 0

3 years ago