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3 years ago

1 more pls helppppppp

Mathematics

1 answer:

Stella [2.4K]3 years ago

7 0

Answer:

A? I think but also it may not be but that's what I think good luck

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the earths diameter through the equator is about 8,000 what is the earths estimated diameter written as a whole number multiplie

Sauron [17]

Answer:

To write 8000 miles in scientific notation, first find a natural number between 1 and 10. (8)

Now, figure out how many decimal places we have to move to the left.

8000.0 --> 8.0000 (Three )

Now, write the number 8 multiplied by 10 to the third power.

( 8 × 10^3 miles )

Step-by-step explanation:

7 0

3 years ago

If you place $1,000.00 in a savings account with an interest rate of 5.25%/month, how much should you earn in interest at the en

Art [367]

Interest earned=principle×interest rate×time
I=prt
I=1,000×0.0525×1
I=52.5

4 0

4 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

BRAINLIESTTT ASAP! PLEASE HELP ME :)<br> thanks!

suter [353]

Answer:

Very first one, A

Step-by-step explanation:

6 0

3 years ago

Does anyone know how to do this

Sloan [31]

Answer:

x = 2 and y =

Step-by-step explanation:

y = 2x - 1

y = -x + 5

2x - 1 = -x + 5

2x + x = 5 + 1

3x = 6

x = 6/3

x = 2

y = 2(3)-1

y = 5

7 0

2 years ago