# Posts by Albert

Total # Posts: 202

**maths**

f(x)=ln(e^x-e^-x), x>0 By applying in turn the Composite and Quotient Rules, find derivative and second derivative. Thanks.

*May 17, 2011*

**maths**

The mean weight (1.0042kg)of the contents of samples of 30 bags of sugar has standard error 0.008kg. Choose the option that is closest to the probability, to three decimal places, that the mean weight of the contents of samples of 30 bags of sugar will be 1kg or more. Options ...

*May 17, 2011*

**maths**

Choose the THREE options that define sequences that do not converge. Options A P0 = 40, Pn+1 − Pn = 2.8 Pn (1− Pn/300) (n = 0,1,2, . . .) B P0 = 100, Pn+1 − Pn = 0.7Pn (1− Pn/480) (n = 0,1,2, . . .) C P0 = 250, Pn+1 − Pn = 2.4Pn (1− Pn/420...

*May 17, 2011*

**maths**

The variation in a population is modelled by the recurrence relation (Jn+1 0.9257 0.0208) (Jn) + (0.014) (An+1 0.0661 0.9767) (An) (0.056) where Jn and An are the sizes, in millions, of the subpopulations of juveniles and adults, respectively, n years after 1 January 2010. On ...

*May 17, 2011*

**maths**

The variation in a population is modelled by the recurrence relation (Jn+1 0.9257 0.0208) (Jn) + (0.014) (An+1 0.0661 0.9767) (An) (0.056) where Jn and An are the sizes, in millions, of the subpopulations of juveniles and adults, respectively, n years after 1 January 2010. On ...

*May 16, 2011*

**maths**

Choose the THREE options that define sequences that do not converge. Options A P0 = 40, Pn+1 − Pn = 2.8 Pn (1− Pn/300) (n = 0,1,2, . . .) B P0 = 100, Pn+1 − Pn = 0.7Pn (1− Pn/480) (n = 0,1,2, . . .) C P0 = 250, Pn+1 − Pn = 2.4Pn (1− Pn/420...

*May 16, 2011*

**maths**

The mean weight (1.0042kg)of the contents of samples of 30 bags of sugar has standard error 0.008kg. Choose the option that is closest to the probability, to three decimal places, that the mean weight of the contents of samples of 30 bags of sugar will be 1kg or more. Options ...

*May 16, 2011*

**maths**

f(x)=ln(e^x-e^-x), x>0 By applying in turn the Composite and Quotient Rules, find derivative and second derivative. Thanks.

*May 16, 2011*

**maths**

f(x)=ln(e^x-e^-x), x>0 By applying in turn the Composite and Quotient Rules, find derivative and second derivative.

*May 15, 2011*

**maths**

The mean weight (1.0042kg)of the contents of samples of 30 bags of sugar has standard error 0.008kg. Choose the option that is closest to the probability, to three decimal places, that the mean weight of the contents of samples of 30 bags of sugar will be 1kg or more. Options ...

*May 15, 2011*

**maths**

Choose the THREE options that define sequences that do not converge. Options A P0 = 40, Pn+1 − Pn = 2.8 Pn (1− Pn/300) (n = 0,1,2, . . .) B P0 = 100, Pn+1 − Pn = 0.7Pn (1− Pn/480) (n = 0,1,2, . . .) C P0 = 250, Pn+1 − Pn = 2.4Pn (1− Pn/420...

*May 15, 2011*

**maths**

The variation in a population is modelled by the recurrence relation (Jn+1 0.9257 0.0208) (Jn) + (0.014) (An+1 0.0661 0.9767) (An) (0.056) where Jn and An are the sizes, in millions, of the subpopulations of juveniles and adults, respectively, n years after 1 January 2010. On ...

*May 15, 2011*

**maths**

f(x)=ln(e^x-e^-x), x>0 By applying in turn the Composite and Quotient Rules, find derivative and second derivative. Thanks.

*May 14, 2011*

**maths**

The mean weight (1.0042kg)of the contents of samples of 30 bags of sugar has standard error 0.008kg. Choose the option that is closest to the probability, to three decimal places, that the mean weight of the contents of samples of 30 bags of sugar will be 1kg or more. Options ...

*May 14, 2011*

**maths**

Choose the THREE options that define sequences that do not converge. Options A P0 = 40, Pn+1 − Pn = 2.8 Pn (1− Pn/300) (n = 0,1,2, . . .) B P0 = 100, Pn+1 − Pn = 0.7Pn (1− Pn/480) (n = 0,1,2, . . .) C P0 = 250, Pn+1 − Pn = 2.4Pn (1− Pn/420...

*May 14, 2011*

**maths**

The variation in a population is modelled by the recurrence relation (Jn+1 0.9257 0.0208) (Jn) + (0.014) (An+1 0.0661 0.9767) (An) (0.056) where Jn and An are the sizes, in millions, of the subpopulations of juveniles and adults, respectively, n years after 1 January 2010. On ...

*May 14, 2011*

**maths**

Choose the THREE options that define sequences that do not converge. Options A P0 = 40, Pn+1 − Pn = 2.8 Pn (1− Pn/300) (n = 0,1,2, . . .) B P0 = 100, Pn+1 − Pn = 0.7Pn (1− Pn/480) (n = 0,1,2, . . .) C P0 = 250, Pn+1 − Pn = 2.4Pn (1− Pn/420...

*May 14, 2011*

**maths**

The variation in a population is modelled by the recurrence relation (Jn+1 0.9257 0.0208) (Jn) + (0.014) (An+1 0.0661 0.9767) (An) (0.056) where Jn and An are the sizes, in millions, of the subpopulations of juveniles and adults, respectively, n years after 1 January 2010. On ...

*May 14, 2011*

**maths**

Sorry for that. its 1.0042 kg

*May 14, 2011*

**maths**

The mean weight of the contents of samples of 30 bags of sugar has standard error 0.008kg. Choose the option that is closest to the probability, to three decimal places, that the mean weight of the contents of samples of 30 bags of sugar will be 1kg or more. Options for ...

*May 14, 2011*

**maths**

The mean weight of the contents of samples of 30 bags of sugar has standard error 0.008kg. Choose the option that is closest to the probability, to three decimal places, that the mean weight of the contents of samples of 30 bags of sugar will be 1kg or more. Options for ...

*May 13, 2011*

**maths**

Choose the THREE options that define sequences that do not converge. Options A P0 = 40, Pn+1 − Pn = 2.8 Pn (1− Pn/300) (n = 0,1,2, . . .) B P0 = 100, Pn+1 − Pn = 0.7Pn (1− Pn/480) (n = 0,1,2, . . .) C P0 = 250, Pn+1 − Pn = 2.4Pn (1− Pn/420...

*May 13, 2011*

**maths**

The variation in a population is modelled by the recurrence relation (Jn+1 0.9257 0.0208) (Jn) + (0.014) (An+1 0.0661 0.9767) (An) (0.056) where Jn and An are the sizes, in millions, of the subpopulations of juveniles and adults, respectively, n years after 1 January 2010. On ...

*May 13, 2011*

**maths**

Thats right. Thank you.

*May 13, 2011*

**maths**

The variation in a population is modelled by the recurrence relation (Jn+1 0.9257 0.0208) (Jn) + (0.014) (An+1 0.0661 0.9767) (An) (0.056) where Jn and An are the sizes, in millions, of the subpopulations of juveniles and adults, respectively, n years after 1 January 2010. On ...

*May 12, 2011*

**maths**

thanks

*May 12, 2011*

**maths**

The variation in size from year to year of a particular population can be modelled by an exponential model with annual proportionate growth rate 0.1246. The size of the population at the start of the initial year is 360. Choose the TWO options that give, as predicted by the ...

*May 12, 2011*

**maths**

Choose the THREE options that define sequences that do not converge. Options A P0 = 40, Pn+1 − Pn = 2.8 Pn (1− Pn/300) (n = 0,1,2, . . .) B P0 = 100, Pn+1 − Pn = 0.7Pn (1− Pn/480) (n = 0,1,2, . . .) C P0 = 250, Pn+1 − Pn = 2.4Pn (1− Pn/420...

*May 12, 2011*

**maths**

The variation in size from year to year of a particular population can be modelled by an exponential model with annual proportionate growth rate 0.1246. The size of the population at the start of the initial year is 360. Choose the TWO options that give, as predicted by the ...

*May 12, 2011*

**maths**

A sequence is defined by un = 2×(−0.5)n + 3 (n = 1,2,3, . . .). Choose the option that best describes the long-term behaviour of the sequence. Options A un becomes arbitrarily small (that is, un → 0 as n→∞). B un becomes arbitrarily large and ...

*May 12, 2011*

**maths**

The variation in size from year to year of a particular population can be modelled by an exponential model with annual proportionate growth rate 0.1246. The size of the population at the start of the initial year is 360. Choose the TWO options that give, as predicted by the ...

*May 11, 2011*

**maths**

The method for completing the square can be used to write the expression −2x^2 + 12x−5 in the form a(x + b)^2 + c, where a, b and c are constants. Choose the option that gives the value of c. Options A −23 B −13 2 C 5 2 D 3 E 13 F 14

*May 11, 2011*

**maths**

A sequence is defined by un = 2×(−0.5)n + 3 (n = 1,2,3, . . .). Choose the option that best describes the long-term behaviour of the sequence. Options A un becomes arbitrarily small (that is, un → 0 as n→∞). B un becomes arbitrarily large and ...

*May 11, 2011*

**maths**

The mean weight of the contents of samples of 30 bags of sugar has standard error 0.008kg. Choose the option that is closest to the probability, to three decimal places, that the mean weight of the contents of samples of 30 bags of sugar will be 1kg or more. Options for ...

*May 11, 2011*

**maths**

By first applying the Product Rule, choose the option that gives (correct to two decimal places) the overall maximum value of the function f(x) = e^3x cos(2x) on the interval [1/12 π, 1/4π]. Options A 0.49 B 1.90 C 2.19 D 2.42 E 3.97 F 5.88 G 7.46 H 10.55

*May 11, 2011*

**maths**

Choose the option that gives an expression for the indefinite integral ʃ (cos(4x) + 2x^2)(sin(4x) − x) dx. In each option, c is an arbitrary constant. Options A cos(4x) + 2x^2 +c B -1/8cos(4x) + 2x^2)^2 +c C 1/4 (sin(4x) − x)^2 + c D (1/(2 (sin(4x) − x...

*May 11, 2011*

**maths**

Choose the option that gives (correct to two decimal places) the area of the region which is bounded by the x-axis and by the graph of y =(20(7 − x)(x − 3))/x^2 . Options A 0.47 B 1.31 C 2.09 D 3.76 E 5.12 F 6.55 G 8.20 H 9.46

*May 11, 2011*

**maths**

Choose the option that gives the solution of the initial-value problem dy dx=(1 + 2 cos2x^2)/y (y > 0), y= 1 when x = 0. Options A y = 1+ 2sin^2 x B y = (1 + 2 sin x)^2 C y = (4x + cos(2x))^2 D y = 4x + cos^2 x E y =sqrt(4x + cos(2x) F y =sqrt(1 + 4x + sin(2x)) G y =1/(sqrt...

*May 11, 2011*

**maths**

The mean weight of the contents of samples of 30 bags of sugar has standard error 0.008kg. Choose the option that is closest to the probability, to three decimal places, that the mean weight of the contents of samples of 30 bags of sugar will be 1kg or more. Options for ...

*May 11, 2011*

**maths**

The mean weight of the contents of samples of 30 bags of sugar has standard error 0.008kg. Choose the option that is closest to the probability, to three decimal places, that the mean weight of the contents of samples of 30 bags of sugar will be 1kg or more. Options for ...

*May 10, 2011*

**maths**

The mean weight of the contents of samples of 30 bags of sugar has standard error 0.008kg. Choose the option that is closest to the probability, to three decimal places, that the mean weight of the contents of samples of 30 bags of sugar will be 1kg or more. Options for ...

*May 9, 2011*

**maths**

A ship travels at a constant speed of 25 kilometers per hour (kph) in a straight line from port A located at position (xA, yA) = (−100,−100) to port B at (xB, yB) = (300, 100). (a) (i) Find the equation of the line of travel of the ship. (ii) Find the direction of ...

*May 9, 2011*

**statistics**

The heights in centimetres of men in a sample selected at random may be modelled by a normal distribution with mean 180.5 and standard deviation 11.3. 1. Choose the option that is closest to the value above which 30% of the heights of men will lie. Options for Question1 A 174....

*May 9, 2011*

**physics**

how fast will a object be traveling when drppped from 30 feet high

*April 4, 2011*

**math163**

Please i need all the process.. thank you.. for the polynomial, list each real zero and its multiplicity. determine whether the graph crosses or touches the x-axis at each x-intercept. f(x)=1/2x^4(x^2-5)(x+1)

*March 1, 2011*

**math-163**

so what is the solution

*March 1, 2011*

**math-163**

for the polynomial, list each real zero and its multiplicity. determine whether the graph crosses or touches the x-axis at each x-intercept. f(x)=1/2x^4(x^2-5)(x+1)

*March 1, 2011*

**i dont get it so whick would be the solution or answer**

i don't get it so whick would be the solution or answer

*March 1, 2011*

**chemistry**

A HOT CUP OF COFFEE HAS SOME SUGAR COMLETELY DISSOLVED IN IT. AFTER THE COFFEE HAS COOLED, SOME SUGAR APPEARS AT THE BOTTOM OF THE CUP. EXPLSIN WHAT HAS HAPPENED IN TERMS OF SATURATION.

*February 24, 2011*

**english**

above case, but,

*February 24, 2011*

**chemistry**

A HOT CUP OF COFFEE HAS SOME SUGAR COMLETELY DISSOLVED IN IT. AFTER THE COFFEE HAS COOLED, SOME SUGAR APPEARS AT THE BOTTOM OF THE CUP. EXPLSIN WHAT HAS HAPPENED IN TERMS OF SATURATION.

*February 24, 2011*

**English-help**

Yes,; but, I don't much like "conducting" an analysis.

*January 5, 2011*

**Physics Honnors**

A 15 kg block of wood is sitting on a 1.5 meter high shelf. Calculate its gravitational potential energy

*January 4, 2011*

**Calculus**

implicit differentiation y^5 + x^2y^3=1 + x^4y

*December 11, 2010*

**Physics**

A man enters a tall tower, needing to know its height. He notes that a long pendulum extends from the ceiling almost to the floor and that its period is 28.0 s. (a) How tall is the tower? m (b) If this pendulum is taken to the Moon, where the free-fall acceleration is 1.67 m/...

*December 5, 2010*

**Physics**

The free-fall acceleration on Mars is 3.7 m/s2. (a) What length pendulum has a period of 4 s on the earth? cm What length pendulum would have a 4 s period on Mars? cm (b) A mass is suspended from a spring with force constant 10 N/m. Find the mass suspended from this spring ...

*December 5, 2010*

**Pre-Calculus**

211.6 units squared

*October 4, 2010*

**Math**

(a-4)9

*September 15, 2010*

**physics**

ur mom

*August 25, 2010*

**science**

a storage cell produces current through chemical reactions that can be reversed? true? a primary cells produces current thur chemical reaactions that continue until one or more reactants is used up? false? i am on the right track?

*June 3, 2010*

**Math/ Probability**

lol

*May 12, 2010*

**Math**

sin9 degere

*March 30, 2010*

**Geometry**

The perimeter of a rectangle is 76 feet. If the width is doubled and the length is halved, the new rectangle will have a perimeter of 62 feet. Find the dimensions of the original rectangle. Define your variables.

*March 8, 2010*

**calculus**

Consider the solid obtained by rotating the region bounded by the given curves about the x-axis. y=6x^5, y=6x, x>or equal to 0 Find the volume V of this solid.

*February 2, 2010*

**5th grade math**

there are 16 girls and 9 boys in mr thompson classroom. which percentage of students are girls?

*January 27, 2010*

**Math - Algebra**

Thanks a lot. This really helps me understand the problem better. Hope I can help someday! :)

*November 13, 2009*

**Math - Algebra**

If I have a garden that is square with sides of length x feet and next spring I plan to make it rectangular by lengthening one side 3 feet and shortening the other side by 3 feet. Find a polynomial A(x) that represents the new area. By how much will the area of the new garden ...

*November 13, 2009*

**statistics**

3 different drugs are under consideration for trating a given ailment. in the past 10,000 applications, drug A was sed 2500 times, drug B 4000 times, and drug C 3500 times. when an expert was asked to rank the effectiveness of the 3 drugs, he replied: "drugs A is twice as...

*November 12, 2009*

**Algebra**

Find the zeros of the polynomial function and state the multiplicity of each f(x) = (x^2-5x+6)^2

*July 7, 2009*

**Physical Science**

If the density of ice is 0.92 g/cm^3, what percent of an ice cube’s (or iceberg’s) mass is above water.

*April 15, 2009*

**Physical Science**

How does the apparent weight loss of the an object compare with the weight of the water displaced by the object?

*April 15, 2009*

**math**

...I already solved one for you just like this...

*November 15, 2008*

**math**

And please type the whole equation next time. We do not have ESP.

*November 15, 2008*

**math**

5+2(x-1) = 12 5+2x-2 = 12 5+2x = 14 2x = 9 x = 9/2 (which is 4.5)

*November 15, 2008*

**math**

5+2(x-1) = 0 5+2x-2 = 0 5+2x = 2 2x = -3 x = -3/2 (which is -1.5)

*November 15, 2008*

**science**

Already did.

*November 15, 2008*

**chemistry**

Q=cm(Tf-Ti) Q = the heat of an object m = the mass c = the heat capacity of the substance Tf= the final temperature Ti= the initial temperature Q gained by water = Q lost by copper Make sure your units go together.

*November 15, 2008*

**Science**

x = time (independent) y = distance (dependent) horizontal: y isn't changing diagonal: y is increasing at a constant rate

*November 15, 2008*

**history**

There's also plenty of links on the bottom of the Wikipedia article under "External Links".

*November 15, 2008*

**history**

Google / Google Scholar

*November 15, 2008*

**PHYSICS**

Size Mass Weight Shape Color Density

*November 15, 2008*

**PHYSICS**

F=ma ( Newton = kg*(m/s^2) ) When you multiply the mass (in kilograms) of an object by how much it's being accelerated, you'll get how much force (in Newtons) it's exerting.

*November 15, 2008*

**math**

x^2 (SHIFT+6)

*November 15, 2008*

**physics**

F=ma ( Newton = kg*(m/s^2) ) When you multiply the mass (in kilograms) of an object by how much it's being accelerated, you'll get how much force (in Newtons) it's exerting.

*November 15, 2008*

**i need help on science**

please somebody smart answer this question like Ms.Sue or anybody else. how are earthquake vibrations used to study earth's layers?

*November 14, 2008*

**math 5th grade**

ha ha i already knew.just kidding i never knew.THANKS.

*November 14, 2008*

**math 5th grade**

i need all the prime numbers of 1-100

*November 14, 2008*

**science**

how does the mantle material get energy to move in convection currents?

*November 14, 2008*

**science**

does water evaporate in reserviours

*November 13, 2008*

**music instruments**

whats a mandolin

*November 13, 2008*

**art**

what are the primary colors?

*November 13, 2008*

**PhYsIcS**

A 5 meter, 100 N/m spring is at a 30 degree angle to the horizontal. If a 10 kg weight is placed on the spring when it is compressed 2 meters, how high will it travel?

*November 2, 2008*

**2nd grade**

i know kangaroo is joey

*November 2, 2008*

**Ethnic Diversity**

I agree Axia needs to do some updating. The only thing that I was really able to find that took place in recent times were the Congresstional hearings dealing with the civil rights of Muslim Americans.

*September 2, 2008*

**PRE calculus**

Find the area between each curve and the x-axis for the given interval. y=6x^2+5 from x=0 to x=5 I'm just starting to learn about this and am very confused. Can someone show me how to do this. Thanks. I need help.

*May 14, 2008*

**Language art**

i need help

*April 19, 2008*

**biology**

can you tell me information about deoxygenation of hydrogen peroxide and organic catalyst

*November 27, 2007*

**2nd grade math**

what is mental math and how does it work. the question is use mental math to find the missing numbers. look for the pattern in each chart.the chart ooks like eight boxes two rows of four, the filled in is 0,1,2,3,4the second row is empty, the second queston is make 6 two rows ...

*August 27, 2007*

**Finance**

how do you take the fourth root? Please refer to the example below? Using Amount = Present Value(1+i)^n we do not know i. 249=183(1+i)^4 1.3606557=(1+i)^4 take the fourth root 1.0800331=1+i giving you i=0.0080031 so the annual rate is 8%

*July 17, 2007*

**Punctuation**

1. Well, with five gallons of gas in your Alfa, we might make it to the state line and escape them! 2. She said, "The goose bit the mailman on the leg!" Now, that is silly; geese don't bite. 3. Oh dear! Because the store is closed, Mom will be in trouble since ...

*November 23, 2006*