On the average, a certain light bulb is supposed to last 450 hours. If itcan expect to finish reading during the life of the bulb?

Answers

Answer 1

Answer:

Answer:

72 novels

Step-by-step explanation:

A number of assumptions are involved regarding operating environment, utilization fraction, and probability of failure as a function of time. The precise meanings of the words "average", "supposed to last", "maximum", and "expect" are involved. The details are too arcane to go into here.

(450 hours)/(6 1/4 hours/novel)

= (450/(25/4)) novels

= (450*4/25) novels

= 72 novels

Related Questions

Can someone please tell me if i am right?
Solve the system of linear equations below.y = -2x + 19y = x + 7
Ali's dog weighs 8 times as much as her cat. Together, the two pets weigh 54 pounds. How much does Ali's dog weigh?
I need help like frfr Before today over . Someone help me
Mary says the pen for her horse is an acute an right triangle. Is that possible. explain

What is 3 8/15 simplified?

Answers

the answer is 53 because when 15 is multiplied to 3 the answer is 45. Then when 45 is added to 8 the answer is 53

answer is 53, because when you 15×3=45, and
45+8=53

Write the product of 0.4. X 0.4 x 0.4 in exponential form

Answers

Answer:

(.4) ^3

Step-by-step explanation:

0.4. X 0.4 x 0.4

We are multiplying 3 of the number .4 's together

The number 3 is the exponent

(.4) ^3

Answer:

The answer is 0.4^3 blahblahblah(I needed at least 30 characters)

Two ants are at a common point at time t=0, the first ant starts crawling along a straight line at the rate of 4 ft/min. Two minutes later, the second ant starts crawling in a direction perpendicular to that of the first, at a rate of 5 ft/min. How fast is the distance between them changing when the first insect has traveled 12 feet? Thank you!

Answers

I looked at this just before going to bed, and it ruined my night, worrying
about it. Then, this morning, when I actually set pencil to paper, it turned
out not to be such a vicious limbic twister.

You DO need to know how to take a chain derivative, though. I must say,
I'm surprised to see this much Calculus at the middle school level. Maybe
it's MY problem, but I just can't see a way to do it without this derivative,
so I'll just show you how I did it:

The ants begin together, and crawl out along the legs of a right triangle.

-- The first one moves at 4 ft/min, so after 't' minutes, he's 4t-ft from
the vertex. The question concerns what happens when this one has
covered 12-ft. That will happen in (12/4) = 3 minutes after he starts out.

-- The second one starts out 2-min later, and moves at 5-ft/min. So,
after 't' minutes, he's 5(t-2) ft from the vertex.

-- The distance between them is the hypotenuse of the right triangle.
The square of the distance is the sum of the squares of the legs:

D² = (4t)² + [ 5(t-2) ]²

We're actually going to need to know how far apart they are after 3 minutes,
so let's do that now.

   D² = (4 x 3)² + (5 x 1)² = (12)² + (5)² = 144 + 25 = 169

   D = √169 = 13-ft apart, after the first guy has covered 12 feet.
   We will need this shortly.

OK. Now, let's simplify the equation for the distance between them,
(as we get ready to differentiate it).

   D² = (4t)² + [ 5(t-2) ]²

   D² = 16t² + (25) (t² - 4t + 4)

   D² = 16t² + 25t² - 100t + 100

   D² = 41t² - 100t + 100

The question asks "How fast is the distance between them changing . . . ? ",
and we know that this is the derivative of 'D' with respect to 't' . It's easy to
take the derivative of the right side of the equation, but what about the derivative
of ' D² ' ?   That's the part that I'm not so sure about in middle school, so I'll just
give it to you:

   (Derivative of D²) is [ (2D) times (derivative of D) ] .

Now we can take the derivative of each side of the equation:

   (2D) x (derivative of D) = 82 t - 100 .

derivative of D = (82 t - 100) / (2D)

That's how fast the distance between them is changing at any time 't' .

After 3 minutes, we calculated 'D' earlier. It's 13-ft

   derivative of D = [ (82 x 3) - 100 ] / (2 x 13)

   = 146 /    26

   = 5.615 feet per second.

Are you confident ? Do you trust me?
I'm not confident at all, and I don't trust myself.
The best I can suggest is for you to go through this and look for my mistakes,
or better yet, sit down with your teacher and go through it for mistakes.
That'll help you think about it and understand it, even if my work is wrong.

Ok, so I'll be quantizing time here to get you the most accurate result I can give you.

What you have to know is that:

$D=\sqrt { { x }^( 2 )+{ y }^( 2 ) }$

Also:

t=time snapshot (in minutes)

x=distance first ant has travelled

y=distance second ant has travelled (perpendicular to the first ant)

D=distance between both ants

--------------------------------------

Now, when:

t=0, x=0, y=0, D=0

t=1, x=4, y=0, D=4

t=2, x=8, y=0, D=8

t=3, x=12, y=5, D=13

Now we quantize time and find the tangent line (slope) between two points on the distance vs time graph at t=3 and t=3.000001, knowing that distance is represented by feet and time is represented in minutes.

When t=3.000001, x=12.000004, y=5.000005 D=13.00000562...

Now we find the slope on the distance vs time graph between the points (3,13) and (3.000001, 13.00000562).

$m=\frac { 13.00000562-13 }{ 3.000001-3 } \n \n =\frac { 281 }{ 50 }$

So, at the point (3,13) on the distance vs time graph, the two ants are moving away from each other at approximately 5.62 feet per minute.

Notations you may require to understand problem in the attachment below.

If x= 0, 1, 2, and 3 and y=1, 1.5, 2, and 2.5, then what is the "y=" function?

Answers

The values are increasing equally so it's a linear function.
The formula is $y=mx+b$
For $x=0$ , $y=1$ so $b=1$ (y-intercept).
Take some point and put its coordinates into the equation to find $m$ (slope).
$2=m\cdot2+1\n2m=1\nm=(1)/(2)\n\n\boxed{y=(1)/(2)x+1}$

Quadrilateral OPQR is inscribed in circle N, as shown below. What is the measure of ∠ ROP? 41
67
113
139
Can someone please explain to me how to do this?

Answers

We should know that the sum of the interior angles or an irregular polygon must be equal to 360°. For examples, the case of a square: 90° +90°+90°+90°=360°. So in our case, the sum of the angles is Sum=360°= (x+17)°+(2x+9)°+ (6x-5)° + meas OPQ, it implies measOPQ=360°-(x+17)° - (2x+9)° - (6x-5)° =360°-9x -31°=(329-9x)°

A large downtown hotel consists of twenty-four levels. There is a ground level referred to as "the first floor", twenty-one above the ground levels (second floor, third floor, etc.) and two underground levels reserved for underground parking. The first level below ground level is Parking A, and the second level below ground level is labeled Parking B. Use the provided horizontal number line to help you answer the following questions. If each above ground level floor corresponds with its floor number on the number line, what number on the number line represents Parking A? [Type your answer as a number.]_______a0

Answers

Since the ground level is referred to as first floor, it represents "1" in the number line.

Now, Parking A is one level below the ground level. So, the corresponding number for it on the number line is 0.

Please refer to the attached graph.

Final answer:

Parking A is represented by the number -1 on the number line.

Explanation:

The first level below the ground level, referred to as Parking A, represents a negative number on the number line. Since there are twenty-four levels in total, including the two underground levels, and each above ground level corresponds to its floor number on the number line, we can calculate the position of Parking A. The ground level, or the first floor, represents the number 0 on the number line. Therefore, the number that represents Parking A on the number line is -1.

Learn more about Parking A on Number Line here:

brainly.com/question/31056643

#SPJ3

Other Questions

14+x=46;x=32whats the answer im so stuck

In a group of 48 children there are three times as many boys as girls. how many girls are there

I don't get 7/8n-3=5/8n+12??

What is the explaining 8688 divided by 8.2 = what