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2 years ago

34.7985347985 rounded to the nearest tenth

Mathematics

2 answers:

Nina [5.8K]2 years ago

7 0

The answer would be 34.8 I’m pretty sure

Phantasy [73]2 years ago

5 0

Answer:

34.8

Step-by-step explanation:

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A car leaves Albany, NY, and travels west toward Buffalo,NY. The equation D=280 - 59t can be used to represent the distance, D,

lions [1.4K]

59 represents the cars distance from albany

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3 years ago

Graph y=3x^2 - 5 and its inverse.

NikAS [45]

Answer:

This is the Graph and it's a Quadratic Function

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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

8 0

3 years ago

Can someone explain c/4=-9 to me? I think I have the answer but it’s confusing.

forsale [732]

Hi there, I think I might be able to help,

C/4=-9

We can multiply by 4 on both sides to balance the equation

C/4 × 4= -9×4

C=-36

Hope that helped!

3 0

3 years ago

What is the answer to in a science class the girl to boy ratio is 3 to 7 out of 50 student how many are boys?

tigry1 [53]

If the ratio of girls to boys is 3:7,
then: 3/10 of the class are girls and 7/10 of the class is boys
Note: 3+7 = 10

If the class has a total of 50 students we can find the number of boys by doing this:

(total number of kids) x (fraction of the kids that are boys) = # of boys

50 x (7/10) = 35

There are 35 boys in the class.

8 0

3 years ago