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3 years ago

What is the age of the universe and how do we know this?

Advanced Placement (AP)

2 answers:

igomit [66]3 years ago

7 0

Answer:

Almost 14 billion

Explanation:

I read it in an encyclopedia:-)

patriot [66]3 years ago

4 0

Answer:Astronomers estimate the age of the universe in two ways: 1) by looking for the oldest stars; and 2) by measuring the rate of expansion of the universe and extrapolating back to the Big Bang; just as crime detectives can trace the origin of a bullet from the holes in a wall.

Explanation:

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The equations of the tangent to the curve y=xsinx at the point (pi/2,pi/2) is

never [62]

The first thing you have to realize is that tangent is the slope of a curve on a given point. You can solve for the slope by finding the derivative of the given function. So:

$\frac{d}{dx} xsin(x)$

Next use product rule (I recommend watching videos if you're confused):

$= [sin(x)] + [x*cos(x)]$

Next substitute you x-value (π/2) into your derivative:

$= [sin( \frac{ \pi}{2} )] +[ \frac{\pi}{2}*cos( \frac{\pi}{2})]$
$= 1 + \frac{\pi}{2} *0$
$= 1$

So our slope at π/2 is 1. Next we use our slope-form and substitute our given value and solve for y-intercept (algebra-stuff)

$( \frac{\pi}{2}) = 1( \frac{\pi}{2}) + b$
$b = 0$

So we get our equation:

$y = x$

So our answer is E

Feel free to ask any questions.
Hopes this helps!

8 0

3 years ago

In accordance with the uniform regulations found in CCR-145-2, in which of the following scenarios is the wearing of the militar

n200080 [17]

Answer:

The scenarios in which it is not permissible to wear options are;

Cadet Hastings is attending a ceremony honoring veterans at a political rally

Cadet Vonning volunteered to "get out the vote" at his high school by passing out information about polling places and times

Explanation:

Junior Reserve Officers' Training Corps (JROTC) Cadets are barred from putting on Army uniform in the following scenarios

(1) To promote commercial or political activities or interests

(2) When taking part in public demonstrations, public rallies, public marches, picket lines, broadcasted or while being interviewed in public, without authorization

(3) When in attendance of an event or meeting sponsored by or related to an extremist organization.

8 0

3 years ago

Messengers delivered letters because they had:

sesenic [268]

Messengers delivered letters because they had No Postal system

7 0

3 years ago

What part of a cell determines a persons blood type

Zolol [24]

Answer:

Red blood cell ( RBC)

Explanation:

The antigens expressed on the red blood cell determine an individual's blood group. The main two blood groups are called ABO.

5 0

3 years ago

Read 2 more answers

Our reaction to a stressor can include

AVprozaik [17]

I ain’t never seen two pretty best friends
Ones of them always gotta be ugly

3 0

3 years ago