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4 years ago

One year after graduating from college, Sam earned $42,000. Each year, he earned $4000 more.

Mathematics

2 answers:

Temka [501]4 years ago

8 0

Answer:

=4000n+38,000

Step-by-step explanation:

xxMikexx [17]4 years ago

4 0

The answer is:
an=4000n+38,000

Sam has $42,000 one year after graduating. So when he graduates, he would have $38000.

Hope this helps!

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At Garland School, 3/5 of the 490 students are boys.

Masja [62]

Step-by-step explanation:

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3 years ago

Of the coins in simones’s collection there is 13/25 are quarters. Of those quarters 2/3 are are state quarters, way fraction os

Reil [10]

Answer:

13/25 * 2/3 = 26/75

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3 years ago

The average score on a standardized test is 750 points with a standard deviation of 50 points. If 2,000 students take the test a

tatuchka [14]

I the average score is 750 and standard deviation ( sigma ) is 50 points, then score 700 - 800 is between (750 - 1 sigma) and (750 + 1 sigma).
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4 years ago

I really need help with this question please someone help me

Radda [10]

$\mathrm{Inverse\:of}\:\frac{7}{x}-9:\quad \frac{7}{x+9}$

$\mathrm{Inverse\:of}\:\frac{x}{6}+8:\quad 6x-48$

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$\mathrm{Inverse\:of}\:2+\sqrt[3]{x}:\quad x^3-6x^2+12x-8$

4 0

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