# Posts by paul

Total # Posts: 945

**math**

Two cards are drawn in succession without replacement from a standard deck of 52 cards. What is the probability that the first card is a spade given that the second card is a club? (Round your answer to three decimal places)

**combustion**

A glass melting furnace is burning ethane (C2H4) in pure oxygen (not air). The furnace operates at an equivalence ratio of 0.9 and consumes 30 kmol/hr of ethane. (A) Determine the energy input rate based on the LHV of the fuel. Express your result in both kW and Btu/hr. (B) ...

**combustion**

You have a gaseous octane (C8H18(g)). Calculate the lower heating value (LHV) and higher heating value (HHV) of the given fuel in MJ/kg(fuel).

**Social Studies**

What do you think it is?

**Social Studies**

My guess is either William the Conqueror or Henry II.

**Social Studies**

Whose marriage transferred large amounts of French lands to the English king and essentially made the King of England a vassal to the French King? (1 point) Richard I & Lady MacBeth Edward the Confessor & Diana of Wales William the Conqueror & Margorie of Wessex Charles III & ...

**psychology**

Dr. Doolittle was often late for his daily psychology class, and his eager students decided they'd had enough. One day, the students put their waiting time and their knowledge of psychology to use by coming up with a plan to encourage the good doctor to be on time. The ...

**psychology**

In order to study the schools of children from poor families, Jonathan Kozol moved to several different U.S. cities and taught in their poorest schools. After doing this for a few years, he wrote a book about his findings. Kozol's work is an example of a/an __________ ...

**psychology**

Bronfenbrenner's bioecological theory is often explained by using a diagram that looks like a target with the individual in the bull's eye position. What is his point? A. The individual is a constant target for negative influences of a hostile environment. The bull'...

**phycology**

Ms, Sue, you don't have to be so rude to let me know I misspelled a word. I will make a fix that. Thank you for the heads up

**phycology**

Individual differences originate as a result of three basic developmental influences. These influences can best be summed up as: A. heredity, genetics, and environment. B. heredity, environment, and maturation. C. family, friends, and ethnicity. D. socioeconomic status, risk ...

**phycology**

Abstract thinking and scientific reasoning generally do not begin to develop until: A. middle adulthood. B. young adulthood. C. adolescence. D. middle childhood. My answer is D.

**phycology**

Because Lucy is large for her age, she may not have many friends. This is an example of the interaction between which two types of development? A. Physical and psychosocial B. Physical and cognitive C. Cognitive and psychosocial D. Psychosocial and intellectua My choice is A, ...

**phycology**

Which one of the following instances is an example of qualitative change? A. Last year two-year-old Helga could not talk, but now she can carry on a conversation. B. Fifteen-year-old Marty grew 3 inches over the summer. He is now taller than Dad. C. Nine-year-old Billy Bob can...

**phycology**

Life span developmental studies are based on the idea that: A. development occurs early in life, but not in late adulthood. B. there is almost no continuity over the lifespan, so an individual's history has little effect on development. C. sociohistorical events affect ...

**math**

whats the value of the 5 in 752,034

**health**

Please post a 150-300-word response to the following discussion question by clicking on Reply. What are some of the challenges to achieving overall health and wellness? How can you overcome these challenges?

**Calculus**

what does Tn stand for?

**Calculus**

I was able to solve (e), this is the only one I don't get. Determine whether the series is convergent or divergent and say what test you used to solve it. (d) sum n=1 to infinity (5n)^(3n) / (5^n + 3)^n

**calculus**

Determine whether the series is convergent o divergent and say what test you used to solve it. (d) sum n=1 to infinity (5n)^(3n) / (5^n + 3)^n (e) sum k=1 to infinity 5 / sqr(2k - 1)

**Calculus - Series4**

so what's the best way to find that number? would it be putting n towards infinity or 0?

**Calculus - Series4**

Okay I get it now!! Thanks a lot Steve :)

**Calculus - Series4**

Ok so lower bound is the lowest achievable value, so upper bound will be the highest, right?

**Calculus - Series4**

or rather it starts off at 2

**Calculus - Series4**

Oh, 2 would be the upper bound? Because it can't go higher than 2?

**Calculus - Series4**

Because I thought that if it decreases it'll eventually get lower than 1. What is the definition of lower and upper bound, I don't get that part.

**Calculus - Series4**

so the upper bound is 1, since it converges, right?

**Calculus - Series4**

but if I put n = 1 in both I get =2 for the first and =1.8 for n+1. Or is that not how I go about doing it?

**Calculus - Series4**

Determine if the following sequence: { (n + 1)^2 / (n^2 + 1) }, is ascending, descending and find the lower bound b OR the upper bound B. (n + 1)^2 / (n^2 + 1) > ((n+1) + 1)^2 / ((n+1)^2 + 1) so the sequence is descending, it's the bounds I don't know how to find.

**Calculus -Series3**

Ok I see, I was just adding the same fractions on every line instead of just adding the answer from the previous. Thanks Steve!

**Calculus -Series3**

Find the sum of the following convergent series: (a) Ei=1 1 / (3i - 2)(3i + 1) I know that it equals: = 1/4 + 1/28 + 1/70 + 1/130 + 1/208 a= 1/4, but I can't figure out what r = 1/4 * 1/7 = 1/28, but from 1/28 to 1/70 and so on it doesn't work anymore.

**Calculus - Series2**

Found it, the answer is S=3

**Calculus - Series2**

Find the sum of each of the convergent series: b) 5 - 1/3 + 20/9 - 40/27 + 80/81 ..... so first we need to find the general term, and I'm not sure of my answer, but I got: ((-1)^2 * 2!)/3^n and a0 = 5 From here on I'm lost.

**Calculus - Series**

so I realized it's not using the derivative that we find if a sequenec is ascending/descending, but rather comparing the series. Nonetheless, the sequence is still descending.

**Calculus - Series**

Determine if the following sequence: { (n + 1)^2 / (n^2 + 1), is ascending, descending and find the lower bound b OR the upper bound B. So I found that the sequence is descending changing the n's for x's and using the derivative. But now I'm not sure on how to ...

**lanuage arts**

What is the simple subject or predicate in the phrase the big yellow bird?

**Calculus**

nevermind, I got it. It's convergent because the definite integral is = 3!

**Definite Integral**

Thanks Steve!

**Definite Integral**

alright, thanks Reiny!

**Definite Integral**

Calculate the following integral: upper limit: 1 lower limit: -2 ∫ (5x + 3) / (x^2 + 4x + 7) dx Do I do a polynomial division for this one? Thank you

**calculus**

Thank you Steve

**calculus**

Calculate the following integral: ∫ (square root(9x^2 - 16)) / x^2 I found: ∫ (square root((3x)^2 - (4)^2)) / x^2 x = a sec0 3x = 4 sec0 x = 4/3 sec0 dx = 4/3 sec0tan0 d0 4/3 ∫ [(square root(4sec0)^2 - 16)(sec0tan0 d0)] / x^2 I'm lost from here and don&#...

**physics**

This cannot be answered. There is just too much missing information to even guess at a possible answer. There are multiple break speeds which can vary the vector of the cue ball after impact, each resulting in the cue ball landing 14.25 ft from the table. Here are two clear ...

**Mathematics**

Elena, i have a little problem with your calculation. I was thinking the velocity of the swimmer should tally with one of the adjacent sides of the triangle and not the hypothenus. the hypothenus should be in line with the resultant velocity of the swimmer.

**math**

7 digit number have 8 in the thousands place.

**math**

In 1980 in Montana the temperature rose from -32 degree's f to 15 degree's f in 12 hours. How much did the temperature increase? is it -47 or +47?

**math**

In 1980 in Montana the temperature rose from -32 degree's f to 15 degree's f in 12 hours. How much did the temperature increase?

**math**

In 1980 in Montana the temperature rose from -32 degree's f to 50 degree's f in 12 hours. How much did the temperature increase?

**chemistry**

The density of Hexane is 0.659 g/mL. What is the mass of hexane in 25.9 mL?

**Calculus**

THanks Steve, but why 3x+5??

**Calculus**

Evaluate the following definite integral: integral at a = -1, b=2 -4dx/(9x^2+30x+25) Would I have to separate them in 3 terms as: -4 ∫1/9x^2 + ∫1/30x + ∫1/25 resulting in: -4/(3x^3)+ (15x^2)+ C? and from there I can replace a and b f(a) - f(b)? Thank you

**Calculus**

This is another textbook number that doesn't have the solution and I can't figure it out. Any tips would be greatly appreciated. For each of the plane surfaces, calculate the exact surface area. (Answer in fractions) (a)The surface composed of all surfaces bounded by ...

**Calculus**

Thanks Reiny :)

**Calculus**

This is a question from my textbook that does't have a solution and quite frankly I have no idea what to do. Any tips would be greatly appreciated. Given the function f defined by f(x) = 9 - x^2. Find the surface area bounded by the curve y = f(x), the x axis and the lines...

**Calculus - Verification**

Hello, I just wanted to verify this definite integral and if my answer is good: a = 1 and b = 4 integral of (1 - 1/x^2)(x^2 + 1/x) dx = (x + 1/x)(x^3/3 + lnx) + C (4 + 1/4)(64/3 + ln4) - (1 + 1)(1/3 + ln1) = 96.56 - 0.6666 = 95.89 THank you

**Calculus**

awesome, thanks man!

**Calculus**

ok Damon, so if you integrate what you have me, you get 1/u no? Because 1/u^2 = -1/u, so -1/u^2 = 1/u?

**Calculus**

so I tried again and I got this, don't know if it's good:(I also put the wrong a and b) integral 0 = a and b = pi/3 of sinx dx/(1+cos)^2 u = cosx du= -sinxdx -1 du = sinx dx so: integral -1 du/(1+u)^2 = 1/(u+1) if x = 0, then u = 1 if x = pi/3, then u = 1 so 1/1+1 - 1/...

**Calculus**

Evaluate the following integral integral 1 = a and b = 4 of sinx dx/(1+cos)^2 u = cosx du = -sinx dx so from here I don't know if I can do: -1 du = sinx dx or 1/sin du = x dx

**Math**

The acceleration of an object g = -9.8 m/s^2. From the top of a building of 245 m., an object is thrown upwards at an initial velocity of 12m/s (a) What is the function for the velocity of the object? I put vf^2 = Vi^2 + 2a(yf-yi) vf^2 = 216.09 + 19.6 (yf - 245) (b) Determine ...

**Calculus**

thanks a lot mate

**Math**

find the area* sorry

**Math**

ind thearea bounded by y= -0.5x+6, y= 1/4 x and the y-axis.

**Science**

Describe each stage of the flow of information starting with DNA and ending with a trait? manifest - provide evidence for

**Algebra**

A seismograph 300 km from the epicenter of an earthquake recorded a maximum amplitude of 5.7 102 µm. Find this earthquake's magnitude on the Richter scale. (Round your answer to the nearest tenth.)

**Airplane trig question**

An airplane, flying at a speed of 420 miles per hour, flies from point A in the direction 131 degrees for 90 min. and then flies in the direction 41 degrees for 30 min. in what direction does the plane need to fly in order to get back to point A?

**Finance**

15.0%

**math**

Permute Sub(11)Psub(4) Sub(5)Csub(5)

**SQL**

1. How do you display letters in uppercase in access? how do you display in lowercase in access? 2. how do you round a number to a spisfic number of decimal places in access? how do you remove everything to the right of the decimal place in access? 3. how do you add months to ...

**physics**

i don't understand the concept. i make sense of things by simplifying it to a meaning i can comprehend. with this question i can not do that.

**physics**

Light from a 550 nm source goes through two slits 0.040 mm apart, a screen is 1.5 m from the slits. a)what is the angular separation of the of the two first order maxima occurring on the screen? b)what is the distance between the two first order maxima occuring on the screen? ...

**physics**

What is the force exerted on 40 micro coulombs by 20 micro coulombs? (charges are separated by 80cm)

**Statistics**

The following data represent the number of flash drives sold per day at a local computer shop and their prices. Price (x) Units Sold (y) $34 3 36 4 32 6 35 5 30 9 38 2 40 1 a. Perform an F test and determine if the price and the number of flash drives sold are related. Let (...

**physics**

We could also use:

**math**

5/7-2/3=

**math**

how many more degrees in the angles of a trapezoid than in a square?

**geometry**

How many more degrees in the angles of a trapezoid that in a square?

**Computer Programming**

I need a check on my answers 1) prompt a user to enter an employee name, employee id, and hours worked until a value of "-1" is entered for employye name. my answer: Start Declarations num EmployId, HrsWrked string EmployName housework() detailLoop() Stop housework...

**Geometry**

the area of a regular octagon is 35 cm square. what is the area of a regular octagon with sides five times as long?

**algebra**

fill in the missing values for a retangular prism. length__________? width 7 height 5 surface area 358 volume __________? Formula SA = 2(LxW) + 2(LxH) + 2(WxH)

**math**

fill in the missing vvalues for a retangular prism. length__________? width 7 height 5 surface area 358 volume __________? sa = 2(lw) + 2(lh) + 2(wh)

**math**

Mr Thomas wants to carpet his bed room. The size of the bed room is 15 feet x 27 feet. The carpet sells for $8.95 per square yard,installed. How much will he have to spend to carpet the bed room?

**math**

If 1 meter=39.25 inches, how many inches are in a hectometer

**Solid Mensuration**

Two similar cones have volumes 81pi/2 in^3 and 12pi in^3 and slant height of the bigger cone is 7.5 in. Find the integer solution to the height of the similar cone.

**Solid Mensuration**

Two similar cones have volumes 81pi/2 in^3 and 12pi in^3 and slant height of the bigger cone is 7.5 in. Find the integer solution to the height of the similar cone.

**Physics**

34

**math**

d=9in

**Math 208**

d=9in

**4th grade math**

What would you add to 2/3 to get a sum of 1?

**4th grade math**

How could you find the measurements of the garden with a perimeter of 60 feet and the greatest possible area?

**trigonometry**

Hey thanks! I have the same problem. never thought it would be this easy.

**Physics**

A med tech student pushes a 30-kg carton of books across the floor of her dormitory by exerting a constant force of 185 N at an angle of 37 degrees with the horizontal. If the opposing force of friction is 70 N, how much work does he do as he moves the carton in 4m in 15s? ...

**winter springs high**

how do i solve 2x+7y=-20 and y=3x+7

**math**

what is the probability that that one of my two picks is selected in NY State's Take 5 - (5) numbers are selected from a set of 39 without replacement

**history**

what event set precedence that alleviated the problem of having no law of succession in the empire I have no book Please help

**history**

what is the most deadly phase of a volcanic eruption like the one at vesuvius (I do not have a book show me the link )

**history**

I don't have a book I need your help

**history**

what is the most deadly phase of a volcanic eruption like the one at vesuvius (show link to this)

**history**

who was the roman who made advancenements in medicine by dissecting animals

**history**

I don"t have a book show the link and i read it