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3 years ago

HELP PLZZ.I KNOW NO POINTS BUT JUST PLEASE HELP ME!!!

Mathematics

1 answer:

Svetlanka [38]3 years ago

6 0

Answer:

for number 6 the answer is 6x = -12

the value of x would be 2

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What is the phase of y= -3cos (3x-pi) +5

ratelena [41]

Answer:

$- \frac{\pi}{3}$

Step-by-step explanation:

Given

$y = -3\cos(3x - \pi) + 5$

Required

The phase

We have:

$y = -3\cos(3x - \pi) + 5$

Rewrite as:

$y = -3\cos(3(x - \frac{\pi}{3})) + 5$

A cosine function is represented as:

$y = A\cos(B(x + C)) + D$

Where:

$C \to$ Phase

By comparison:

$C = - \frac{\pi}{3}$

Hence, the phase is: $- \frac{\pi}{3}$

3 0

3 years ago

Situation:A researcher in North America discoversa fossile that contains 65% of its originalamount of C-14..-ktN=NoeNo inital am

zheka24 [161]

SOLUTION

We have been given the equation of the decay as

$\begin{gathered} N=N_0e^{-kt} \\ where\text{ } \\ N_0=initial\text{ amount of C-14 at time t} \\ N=amount\text{ of C-14 at time t = 65\% of N}_0=0.65N_0 \\ k=0.0001 \\ t=time\text{ in years = ?} \end{gathered}$

So we are looking for the time

Plugging the values into the equation, we have

$\begin{gathered} N=N_0e^{-kt} \\ 0.65N_0=N_0e^{-0.0001t} \\ e^{-0.0001t}=\frac{0.65N_0}{N_0} \\ e^{-0.0001t}=0.65 \end{gathered}$

Taking Ln of both sides, we have

$\begin{gathered} ln(e^{-0.000t})=ln(0.65) \\ -0.0001t=ln(0.65) \\ t=\frac{ln(0.65)}{-0.0001} \\ t=4307.82916 \end{gathered}$

Hence the answer is 4308 to the nearest year

8 0

1 year ago

Write the numbers -2.1, -1.8, -2.5 and -2.7 from greatest to least.

Fiesta28 [93]

Answer:

-1.8, -2.1, -2.5, -2.7

Step-by-step explanation:

the bigger the negative number, the smaller it is

5 0

3 years ago

Read 2 more answers

I guess u have to find the area

Nesterboy [21]

18
Because 6•3= 18
Hope this helped

7 0

3 years ago

Read 2 more answers

If F is the midpoint is EG , then X=?

horsena [70]

I don't know the answer but nice computer

5 0

3 years ago

Read 2 more answers

HELP PLZZ.I KNOW NO POINTS BUT JUST PLEASE HELP ME!!!​

HELP PLZZ.I KNOW NO POINTS BUT JUST PLEASE HELP ME!!!