Thursday

April 17, 2014

April 17, 2014

Total # Posts: 415

**Precalculus**

The height (in centimeters) of a candle is a linear function of the amount of time (in hours) it has been burning. When graphed, the function gives a line with a slope of -0.4 . Suppose that the height of the candle after 13 hours is 24.8 centimeters. What was the height of th...

**trig**

Find csc(theta), tan (theta), and cos (theta), where theta is the angle shown in the figure. Give exact values, not decimal approximations c=10 b=7 a=7.14 the right angle is locate between sides a and b and the theta angle is an acutle angle sides b and c. i have sin theta as ...

**trig**

Suppose that Magnus' blood pressure can be modeled by the following function {{{p(t)=83-18sin(71pi*t)}}} Magnus' blood pressure increases each time his heart beats, and it decreases as his heart rests in between beats. In this equation, p(t)is the blood pressure in mmH...

**Applied Math (Biological application)**

I basically need help finding the rest of the solutions.

**Applied Math (Biological application)**

The deformation y(t) of heart muscle from its rest position after t seconds can be modelled as a spring-mass system, described by the differential equation: my" + vy' + ky = F(t) where m, v, and k are positive constants denoting the mass of the myocardial tissue, and ...

**Trigonometry**

Looks like its a triangle within a triangle problem. Still researching to try to find out how to solve

**Trigonometry**

figures above are correct not sure why it has me listed as Stephen. Also, hypotenuse of CB is 2537.98496522845. they are two attached triangles. CAB is the outermost triangle. CD is the opposite side of both triangles. CAD with the angle of 32 degrees. CAD has a hypotenuse of ...

**Trigonometry**

Mountain officials want to build a new ski lift from B to C as shown in the figure below. The distance from A to C is 1480 feet. They measure angle DAC to be 32 degrees and angle DBC to be 18 degrees. What is the distance A from to B? Round your answer to the nearest tenth of ...

**English**

Thank you Ms. Sue... Thank you Emmanuel

**English**

I am 3/7 of a chicken,2/3 of a cat and 2/4 of a goat. What am I?

**math**

4x7-9^4= please help me im super stuck

**evolution article. Please help!!!**

Hi , I am having a very difficult time finding an article that contains a misconception about evolution . The article had to be be published within in this past year. Please help !!! thank you!!

**Physics**

A 55.0kg cheerleader uses an oil-filled hydraulic lift to hold four 130kg football players at a height of 1.20m. If her piston is 19.0cm in diameter, what is the diameter of the football players' piston?

**phyics**

A hand exerciser utilizes a coiled spring. A force of 86.9 N is required to compress the spring by 0.0231 m. Determine the force needed to compress the spring by 0.0432 m.

**phyics**

An object on a vertical spring oscillates up and down in simple harmonic motion with an angular frequency of 25.1 rad/s. Calculate the distance d by which the spring stretches from its unstrained length when the object is allowed to hang stationary from it.

**phyics**

When responding to sound, the human eardrum vibrates about its equilibrium position. Suppose an eardrum is vibrating with an amplitude of 5.0 x10-7 m and a maximum speed of 3.3 x10-3 m/s. (a) What is the frequency (in Hz) of the eardrum's vibrations? (b) What is the maximu...

**phyics**

An object on a vertical spring oscillates up and down in simple harmonic motion with an angular frequency of 25.1 rad/s. Calculate the distance d by which the spring stretches from its unstrained length when the object is allowed to hang stationary from it.

**phyics**

A 0.20-kg object is attached to the end of an ideal horizontal spring that has a spring constant of 120 N/m. The simple harmonic motion that occurs has a maximum speed of 1.1 m/s. Determine the amplitude A of the motion.

**phyics**

An object in simple harmonic motion has an amplitude of 0.202 m and an oscillation period of 0.620 s. Determine the maximum speed of the motion

**math**

celeste hiked 1.8 miles in 0.75 hour. What is her average rate of speed?

**Science **

How long will a skateboarder be out if they decide to travel for 654 meters with a velocity of 1.2 m/s

**Statistics**

A local grocery store wants to estimate the mean daily number of gallons of milk sold to customers. Assume the number of gallons sold follows the normal distribution, with a population standard deviation of 5.10 gallons. A random sample of 60 days shows that the mean daily num...

**math**

25/5 -4 * 2/9

**math**

express each answer in exponential form using the indicated bases 4x4x4x4,base 2

**biology**

what is answer

**math**

order the fractions 1/3 2/5 2/9 1/3 and 4/1 from least to greatest

**physics**

4(a) What is the magnitude of the gravitational force of the Earth on a surveillance satellite of mass 1040 kg that is in a grazing circular orbit 100 km above the surface of the Earth. (b) Find the magnitude of the acceleration of a satellite in such a grazing orbit. (c) Dete...

**3rd grade math**

they are all bigger than 2/5

**math 3rd grade**

hey bud, the rule is y=x ... input x =1 and output y = 1 then 1 = 1 and y = x

**physics**

I still dont get it. cna you explain

**physics**

At what height above Earth's surface is the gravitational acceleration reduced from its sea-level value by 0.60%?

**english**

one purpose of the summary is to ?

**science**

Suppose that the 1.3 km span of the golden gate bridge had no expansion joints. Calculate how much longer the bridge would be if the temperature of the bridge increases by 35 degrees celsious

**physics**

The four tires of an automobile are inﬂated to a gauge pressure of 1.7 × 10 5 Pa. Each tire has an area of 0.023 m2 in contact with the ground. Find the weight of the automobile. Answer in units of N

**physics**

A bicycle wheel has a diameter of 57.7 cm and a mass of 2.66 kg. The bicycle is placed on a stationary stand and a resistive force of 156 N is applied tangent to the rim of the tire. Assume that the wheel is a hoop with all of the mass concentrated on the outside radius. In or...

**Science**

What is electrolysis and what is the purpose of it? Is it dangerous?

**Biology- check my answer (diff one)**

Which of the following are true concerning living things? Check all that apply. A)They contain a vital force absent in nonliving things. B)They are composed of molecules that contain carbon-carbon bonds. C)They undergo chemical reactions to use energy they acquire from the env...

**math**

ms sue can you check my answers please?!?!

**Biology-check my answer**

can someone PLEASE check this?

**Biology-check my answer**

Hershey and Chase used the 35S isotope to label proteins. How does this isotope differ from the 32S isotope found in greatest natural abundance, and why did they choose 35S instead of 32S? A)35S has more protons than 32S; Hershey and Chase used it because it has a greater mass...

**geometry**

Find the slope between the two points and then use whichever point and plug it into this equation: y-y1 = m(x-x1) where y1 and x1 are the coordinates of whichever point you pick and m is the slope

**calculus**

Yes

**calculus**

y=x^3?

**math**

The formula is: P(1+r)^n Where p is the principal amount (or amount you start with) r is the rate (.076) and n is the frequency in years

**math**

I don't think you asked a question

**math**

Multiply 11x5x4 = 220.

**Geometry- Preferably Ms. Sue**

No disrespect intended, but you disproved your point with those links Ms. Sue. The second link, at the very bottom it asks this question: Example: A rhombus has diagonals of 6 m and 8 m, what is its Area? Squares have equal diagonals.

**Geometry- Preferably Ms. Sue**

In order for it to be a square, the diagonals need to be the same length. In a parallelogram (if you are talking about a rhombus), they do bisect, but the diagonals are not equal in length.

**Geometry- Preferably Ms. Sue**

Its B, sorry for not being Ms. Sue

**Help please!!health**

Yes. Children can catch a lot of diseases really fast due to the lack of a proper immune system.

**math hurry please**

Easiest way, SAT tip of the day... Is to plug each answer in and see which works.

**Science**

I've never seen anyone use g/cc before. The usual standard is g/L as they are the standard metric values. However you can definitely use g/mL if used properly.

**math**

In order to void the absolute value bars, it needs to stand by itself. So 4=|x-3| Now get rid of the value bars and you get: 7 = x Plug it in and see !

**ap world history**

I'm just giving back ;)

**ap world history**

Definitely. If you want to be more in depth, you can also include the cultural extent! But I'm sure that's a little too much

**ap world history**

Now it's been a while.. But I'm guessing the nature of an empire is similar to the nature of an animal or human. Like human nature, is our human tendencies. So in a similar fashion, the nature of an empire would be the tendencies of an empire: were they more trade base...

**Business Ms.Sue**

Well I've never taken a business class... but I think it would depend on the sales coming from wholesale or retail. If there was more wholesale, he would have to incur more expenses initially due to the fact that he wouldn't get paid until the end of the month, therefo...

**Differential Calc (Math)**

WOW! Thank you so much! You rock!

**Differential Calc (Math)**

Hm... Never learned this before, so I'm not quite sure if I can use this. However, I appreciate the effort!

**Differential Calc (Math)**

I'm not quiet sure how e^2x equals what you put, and lim (1+3x)^1/(3x) = lim (1+u)^1/u = e doesn't seem to make sense either.. Maybe a more dumbed down version? And it is in fact ^1/(3x)

**Differential Calc (Math)**

Stuck... can't seem to use l'hopitals, nor can I use logrithmic differentiation... lim (e^(2x)+ x)^(1/3x) x->0+ Thank you so much

**Algebra help**

This is one of those problems where you have to set up the peppers as variables. Lets say green peppers are "x" and red peppers are "y". You can then make up a systems of equations to solve for each variable. Dave: 3x + 2y = 3.45 and Ruth: 4x + 3y = 5.00 No...

**science**

You didn't give me the scenarios, but I'm assuming that you want the other variable? Since yellow is dominant, the only way to get green is to have two recessive's.

**math**

Is it possible to have a figure an area of 9 square units and a perimeter of 30? If not, why? (PS I dont think it is possible.)

**Physics**

A ball is thrown straight up in the air at an initial speed of 30 m/s. Using conservation of energy, find the maximum height of the ball.

**statistics**

Which of the following is NOT true with respect to the properties of probability? 0 < x < 1 P(S) = 1, where S is the sample space P(A) + P(Ac) = 0 If two events are independent then P(A and B) = P(A) * P(B)

**statistics**

Suppose the correlation between two variables is -0.57. If each of the y-values is multiplied by -1, which of the following is true about the new scatterplot? It slopes up to the right, and the correlation is -0.57 It slopes up to the right, and the correlation is +0.57 It slo...

**statistics**

Which of the following is NOT true with respect to the properties of probability? 0 < x < 1 P(S) = 1, where S is the sample space P(A) + P(Ac) = 0 If two events are independent then P(A and B) = P(A) * P(B)

**statistics**

Suppose the correlation between two variables is -0.57. If each of the y-values is multiplied by -1, which of the following is true about the new scatterplot? It slopes up to the right, and the correlation is -0.57 It slopes up to the right, and the correlation is +0.57 It slo...

**Physics**

A file cabinet weighing 1500 N is at rest on the floor. The coefficient of static friction between the floor and the cabinet is 0.5. What is the minimum force required to make the file cabinet move horizontally

**trig**

A tree growing on a hillside casts a 121-foot shadow straight down the hill. Find the height of the tree (in feet) if the slope of the hill is 8 degrees and the angle of elevation of the sun from the horizontal is 50degrees.

**Differential Calc**

If: 0 = f(1) = a+b+c+d 2 = f(-2) = -8a+4b-2c+d 0 = f'(1) = 3a+2b+c 0 = f'(-2) = 12a-4b+c "since we now have four equations and four unknowns, we can determine unique solution. Solving for "a" and "b", a=, b=" Please show the steps, I am so...

**Algebra**

If you're not sure how I got that, be sure to ask!

**Algebra**

x = 3

**World History Please Help ASAP Ms. Sue?**

I was talking about thesis for the topic not really how to write a thesis statement.

**World History Please Help ASAP Ms. Sue? **

I am doing a research paper on the opium wars in China. Any suggestions for key points for thesis statement?

**Science**

111/23 = Temp per degree or x x(475)= ?

**math**

Multiply 360 by the percentage which in decimal form is : .07 360(.07) = ???

**math**

Is this the entire problem? No pictures or any other information?

**algebra**

7/5 = x (x)(11) = ?

**math**

5.43 is greater. Why? The decimal is merely a place marker It goes; tenths, hundreds, thousands, etc... 4 tens is more than 3. No you don't have to look at hundreths place because the answer is in the tenths.

**math**

2:30 - 8:45 is 6 hours and 15 minutes Subtract thirty minutes = 5 hours and 45 minutes 7.50(5) = ??

**math**

2 kinds of models, boats and planes. You don't know how many models he has of each so it would be: 2x He has 8 more than of the others 2x + 8 22 total 2x + 8 = 22 2x = 14 (subtract 8) x = 7 (boats) Since he has 8 more planes x + 8 = planes (7) + 8 = 15 15 planes; 7 boats

**gr 9 math**

Please don't abuse the resources by posting a million different problems. Evaluate previous solutions and attempt to reapply them. Or at least attempt to be less obnoxious by posting the problems in one post. IN LEFT TO RIGHT FORMAT.

**englsh**

I believe you are correct.

**algebra 2**

4p + 2q = 8 q = 2p +1 Rearrange either so it aligns, I'll rearrange the bottom. 4p +2q = 8 -2p - q = 8 (subtract 2p from both sides) Pick one that simplifies easily I'll use the 4p one. 4p + 2q = 8 2q = 8 - 4p q = 4 -2p Substitute q value for q in opposite equation -2p...

**math**

how do i write measurements in centimeters in the simplist form

**Physics**

Florence who weighs 120lb stands on a bathroom scale in an elevator. What will she see the scale read when the elevator is accelerating upward at 4.0 m/s^2 a) 120lb b) 135lb 3) 105lb d) 90lb

**Math 8R - HELP! (homework qs. check)**

No. You didn't simplify. -3 (2 + 3x) + x - 5 -6 -9x + x -5 Combine like terms, then you are done.

**math**

Find the following landmarks for 12,16,23,15,16,19,18

**Art**

Oh by the way just one character

**Art**

what Manga should I draw for art class?

**AP English**

Well, like I said I will do corrections, I didn't really proofread that I just banged it out in 3 minutes or so. And yes, multiple times in the novel a character makes one mistake and they send a person/multiple people out to capture them to be lynched. I'm still not r...

**AP English**

Ok, how's this? With the Adventures of Huckleberry Finn, Mark Twain intended to write a novel about a young boy and his journey down the Mississippi River with a slave named Jim. The novel outlined the values and society of the American South in the late 1800s, such as sla...

**AP English**

It's not a paper it's just 3 questions on a reading response sheet. "What did the author intend to do?" "Did they do it?" and "Was it worth doing?" I'm guessing they're meant to be 3-4 sentences each.

**AP English**

What did the author intend to do with Adventures of Huckleberry Finn? Keep in mind I mean the AUTHOR (Mark Twain) not Huck...I'm just really confused by this question...I could say, "Write a novel about-insert plot here-. It outlined the values and society of the Amer...

**math **

Can 0 be the identity for multiplication? Explain why or why not.

**Physics: Vectors**

A hiker walks 10.0 km[NE], 5.0 km[W], and then 2.0 km[S] in 2.5 h. (a) What is the hiker's displacement? (b) In what direction must the hiker set out, in order to return by the most direct route to the starting point? (c) If the hiker walks at a constant speed for the enti...

**Math: Calc: Implicit Derivatives**

Find dy/dx give the relation (x^2/9)+(y^2/16)=1 Thank you!!

**History**

Why is The Persian Gulf War so important to the United States?

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