Sunday
April 19, 2015

Posts by Jacob


Total # Posts: 696

Applied Calculus
Thanks to both of you, I won't forget how to do this next time! It makes much more sense now, and will be even easier on basic functions versus logarithmic/exponential functions. I think it was the natural log that tripped me a little bit there, but thank you for the ...
April 12, 2013

Applied Calculus
I am sorry, the function is g(x)= x/(ln(x))
April 12, 2013

Applied Calculus
Find the absolute extrema of the function on the interval [2,3]. (Round your answers to the nearest hundredth.) Absolute Minimum ___ at x=___ Absolute Maximum ___ at x=___
April 12, 2013

Algebra(1st one was typo)
The function f(x)=x^3 +1/4 x −1^4 is a monotonically increasing function, hence it is injective (one-to-one), so its inverse function exists and is well defined. How many points of intersection are there, between the function f(x) and its inverse f^−1 (x) ?
April 11, 2013

Algebra
The function f(x)=x 3 +1 4 x−1 4 is a monotonically increasing function, hence it is injective (one-to-one), so its inverse function exists and is well defined. How many points of intersection are there, between the function f(x) and its inverse f −1 (x) ?
April 11, 2013

Geometry
Let ƒÆ=sin −1 7 25 . Consider the sequence of values defined by a n =sin(nƒÆ) . They satisfy the recurrence relation a n+2 =k 1 a n+1 +k 0 a n ,n¸N for some (fixed) real numbers k 1 ,k 0 . The sum k 1 +k 0 can be written as p q , where p...
April 11, 2013

Geometry
ABC is a triangle with circumcenter O , obtuse angle BAC and AB<AC . M and N are the midpoints of BC and AO respectively. Let D be the intersection of MN with AC . If AD=1 2 (AB+AC) , what is the measure (in degrees) of ÚBAC ?
April 8, 2013

math
Yes thanks
April 6, 2013

math
Yes I don't know that pattern either
April 6, 2013

math
6_12_9_18_15 Please help find the next three patterns 2_9_16_23
April 6, 2013

Geometry
ABCD is a parallelogram. If ÚABC=35 degrees , what is the measure (in degrees) of ÚADC ?
April 5, 2013

Geometry
Sorry made a mistake you are right
April 5, 2013

Geometry
Actually not because the problem is asking for 3 digits such as 100
April 5, 2013

Geometry
How many three digit numbers have three distinct digits?
April 5, 2013

Applied Calculus
For its beef stew, Betty Moore Company uses aluminum containers that have the form of right circular cylinders. Find the radius and height of a container if it has a capacity of 29 in.3 and is constructed using the least amount of metal. (Round your answers to two decimal ...
April 2, 2013

Calculus
Let N = \int \int \int_B xyz^2\ dV , where B is the cuboid bounded by the regions 0 \leq x \leq 1, -1 \leq y \leq 2 and 0 \leq z \leq 3. If N = \frac{a}{b}, where a and b are coprime positive integers. What is the value of a+b?
March 27, 2013

Applied Calc
That's interesting you say that, listed under my professor's list of things we need to study, he has that listed. Do you believe it to be a mistake? Should I email him perhaps? I see what you are saying here. Thank you Bob.
March 25, 2013

Applied Calc
What is the marginal average cost function?
March 25, 2013

Applied Calculus
I know how to solve it to get .21, but I need to write it using positive exponents only. I know this isn't technically Calculus, but it is what we are reviewing currently. I am a bit rusty with this one, can't quite remember how to do it. I am trying some different ...
March 21, 2013

Applied Calculus
2^(3/4)*4^(-3/2)
March 21, 2013

math
Thx
March 18, 2013

math
2log[base3]9 = ?
March 18, 2013

Applied Calculus
A truck gets 800/x miles per gallon (mpg) when driven at a constant speed of x mph, where 40 ≤ x ≤ 80. If the price of fuel is $2.80/gal and the driver is paid $19/hr, at what speed is it most economical for the trucker to drive? (Round your answer to two decimal ...
March 15, 2013

algebra
a farmer has both cickens and cattle.These animals have a total of 40 heads and 140 feet.How many chicken and how many cattle has this farmer
March 15, 2013

Science
Two children, m1 = 50 kg and m2 = 55 kg, and a plastic sled of mass 35 kg start at rest and slide for 5.0 s down a hill. The force of gravity pulling the children and sled down the hill is 470 N but the snow provides a frictional force of 325 N. At the bottom of the hill, the ...
March 13, 2013

Science
Two children, m1 = 50 kg and m2 = 55 kg, and a plastic sled of mass 35 kg start at rest and slide for 5.0 s down a hill. The force of gravity pulling the children and sled down the hill is 470 N but the snow provides a frictional force of 325 N. At the bottom of the hill, the ...
March 13, 2013

Applied Calculus
I had to miss my last week of Calculus due to some personal things, so I had not been through any lectures of optimization. It hurt me greatly, now I have a few of these that I don't know how to set up at all.
March 13, 2013

Applied Calculus
A rectangular box is to have a square base and a volume of 50 ft3. The material for the base costs 32¢/ft2, the material for the sides costs 10¢/ft2, and the material for the top costs 26¢/ft2. Letting x denote the length of one side of the base, find a function...
March 13, 2013

Applied Calculus
If an open box has a square base and a volume of 112 in.3 and is constructed from a tin sheet, find the dimensions of the box, assuming a minimum amount of material is used in its construction. (Round your answers to two decimal places.) Height: Length: Width:
March 12, 2013

Applied Calculus
If an open box is made from a tin sheet 7 in. square by cutting out identical squares from each corner and bending up the resulting flaps, determine the dimensions of the largest box that can be made. (Round your answers to two decimal places.) Height: Length: Width:
March 8, 2013

Applied Calculus
Find the absolute maximum and absolute minimum values, if any, of the function. (If an answer does not exist, enter DNE.) h(x) = x3 + 3x2 + 4 on [−3, 2]
March 6, 2013

Applied Calculus
Find the relative extrema, if any, of the function. Use the Second Derivative Test if applicable. (If an answer does not exist, enter DNE.) g(x)=x^(3)-9x
March 3, 2013

Applied Calculus
Let f(x) = x3 − 4x2. Find the point(s) on the graph of f where the tangent line is horizontal.
March 1, 2013

Applied Calculus
Let f(x) = −x2 + ax + b. Determine the constants a and b such that f has a relative maximum at x = 2 and the relative maximum value is 13.
February 27, 2013

Applied Calculus
Find the third derivative of the function: g(t)=square root of 7t+5
February 27, 2013

Applied Calculus
Find the third derivative of the function: g(t)=square root of 7t+5
February 27, 2013

math
the riddle answer i got was "try sports tho>' it seems wrong ?
February 26, 2013

math
where did you get 160?
February 26, 2013

math
wait is it 3?
February 26, 2013

math
i dont get how to set it up. i know how to do the math.
February 26, 2013

math
i got 308?
February 26, 2013

math
in science class, there is enough chemical solution for 154 students to complete 12 labs. if 6 more students enroll, for how many labs will there be enough chemical?
February 26, 2013

math
a map in history class uses a scale of 1 inch=50 miles. a line measuring 3/4 inch long represents how many miles?
February 26, 2013

math
the geometry teacher has enough chalk to last for 16 proofs in each of three classes. if a fourth class is added, how many proofs per class can she now do?
February 26, 2013

math
there word problems
February 26, 2013

math
if i asked on here then, i dont know hw to do it..so i need the riddle to see how to get the answers
February 26, 2013

math
what should you do if at first you dont succeed? its a riddle and the letters are y,t,o,r,h,p,s
February 26, 2013

Applied Calculus
If the line passing through the points (a, 1) and (−8, 7 is parallel to the line passing through the points (−11, 8) and (a + 2, 1), what is the value of a?
February 25, 2013

Applied Calculus
Find the x-value of the relative minima of the function: 2x^(2)+((256)/(x))+8
February 25, 2013

Chemistry
What is(are) the precipitate(s) that form when K2SO4, BaCl2, and AgNO3 solutions are mixed?
February 23, 2013

Applied Calculus
Use differentials to approximate the quantity (give answer to 4 decimal places) 4th root of 256.6.
February 21, 2013

geometry
did you hear about... it says its supposed to be a novel.. my words are robins, because,rooster,so,name,sun,best,the,was,banks,gave,wrecked,robinson,farmer,crew,he,who,pet,the,his. it's 13 boxes long.
February 20, 2013

geometry
Did you hear about...(it says it would be a novel name)
February 20, 2013

Applied Calculus
Find the third derivative of the function: (5t+4)^(1/2)
February 20, 2013

Applied Calculus
Find the first and second derivative of the function: x/(7x+10) Using quotient rule. This is part of my homework in the section named "Higher Order Derivatives". I am confused on getting the second derivative, as I found the first derivative to be 10/(7x+10)^2
February 20, 2013

Applied Calculus
Yeah, I was forgetful and forgot it was the Quotient Rule. Thank you all, I got it!
February 18, 2013

Applied Calculus
Find the derivative of the function: (x^(3)-8)/(x^(2)+9)
February 18, 2013

Applied Calculus
Find the derivative of this function: g(t)=(8t+10)^2*(10t^2-7)^-3 Using the Chain Rule.
February 15, 2013

Applied Calculus
Find the derivative of the function. g(t) = ((8t + 10)^2)*(((10t^2) - 7)^-3) I am supposed to use The Chain Rule. However, I am confused as to how to do this.
February 14, 2013

Excel
What are the symbols I would use in Excel for each of the following Comparison Operators? "At Least" --> "More Than" --> "X Or Higher" --> "X Or Less" --> "Not More Than" --> "At Most" -->
February 13, 2013

Applied Calculus
Yeah, what I accidently did was I tried to solve it further, but I completely over thought that. Thank you Bob!
February 11, 2013

Applied Calculus
Find the derivative of the function: f(x)=(x^2+9)/square roote of x
February 11, 2013

Applied Calculus
Find the derivative of the function f by using the rules of differentiation. f(x)=340
February 11, 2013

Science!
How many grams of NH3 gas can be made if 42.0 g of N2 gas and 12.0 g of H2 gas react with each other? N2 + 3 H2 ↔ 2 NH3
February 11, 2013

Math
.05
February 10, 2013

math
Jerome is 1.5 meters tall, and at a certain time of day, he casts a shadow that is 2 meters. His friend measures the shadow formed by a nearby flagpole at the same time of day and finds it to be 24 meters. What is the height of the flagpole?
February 8, 2013

Applied Calculus......
Rewrite the expression using positive exponents only. (Simplify your answer completely.) (x^3-y^3)(x^-3+y^-3)
February 8, 2013

Applied Calculus......
Under a set of controlled laboratory conditions, the size of the population of a certain bacteria culture at time t (in minutes) is described by the following function. P=f(t)=3t^2+2t+1 Find the rate of population growth at t = 9 min.
February 7, 2013

Applied Calculus......
Find the slope m of the tangent line to the graph of the function at the given point and determine an equation of the tangent line. f(x)=6x-5x^2 at (-2, -32) I have to use the four step process, but seem to be getting stuck...
February 7, 2013

Math
A copy machine makes 60 copies per minute. A second copy machine makes 80 copies per minute. The second machine starts making copies 2 minutes after the first machine starts. Both machines stop making copies 8 minutes after the first machine started. Together, the 2 machines ...
February 6, 2013

Accounting
The business was started on April 1st. I have the following events that happened: what accounts should I debit and credit? 1. Incurred advertising expense of $1,907 on account. 2. Hired park manager at a salary of $3,783 per month, effective May 1. 3. Sold 140 coupon books for...
February 6, 2013

Accounting
The business was started on April 1st. I have the following events that happened: what accounts should I debit and credit? 1. Incurred advertising expense of $1,907 on account. 2. Hired park manager at a salary of $3,783 per month, effective May 1. 3. Sold 140 coupon books for...
February 5, 2013

Physics
The drawing shows six point charges arranged in a rectangle. The value of q is 8.07 μC, and the distance d is 0.430 m. Find the total electric potential at location P, which is at the center of the rectangle.
February 5, 2013

Physics
The drawing shows six point charges arranged in a rectangle. The value of q is 8.07 μC, and the distance d is 0.430 m. Find the total electric potential at location P, which is at the center of the rectangle.
February 5, 2013

Physics
The drawing shows six point charges arranged in a rectangle. The value of q is 8.07 μC, and the distance d is 0.430 m. Find the total electric potential at location P, which is at the center of the rectangle.
February 5, 2013

Applied Calculus......
Use the method of bisection to find the root of the equation x^5 + 3x − 7 = 0 accurate to two decimal places.
February 4, 2013

Applied Calculus......
Suppose a snowy-tree cricket chirps 180 times per minute if the temperature is 102 degrees, and chirps 120 times per minute when the temperature is 90 degrees. Construct a mathematical model that will predict the number of chirps per minute at a temperature in degrees ...
February 3, 2013

english
i need to write a historical narrative for school. it has to have dialogue and be in any persons viewpoint from the great depression and world war 2. it has to revolve around a specific climax or such. so i need some help coming up what to write about! thanks much.
February 3, 2013

Applied Calculus......
A book designer decided that the pages of a book should have 1-in. margins at the top and bottom and 1/2 in. margins on the sides. She further stipulated that each page should have an area of 60 in.2. Find a function in the variable x, giving the area of the printed region.
January 29, 2013

Percent word problem
A pitcher holds 2 gallons of orange juice. The orange juice is made 20% concentrated juice and 80% water. How much water is used in the orange juice?
January 18, 2013

Physics
The patient in the figure below is to receive an intravenous injection of medication. In order to work properly, the pressure of fluid containing the medication must be 108 kPa at the injection point. (a) If the fluid has a density of 1024 kg/m3, find the height at which the ...
January 15, 2013

Physics
What force is needed to give a 0.25-kg arrow an acceleration of 196 m/s2? A. 0.25 N B. 49 N C. 196 N D. 748 N
January 15, 2013

floral disign
what is the most effective way for you to locate growers to supply your design needs
January 10, 2013

math
I 1, 2, 4, 8, OR 10
January 9, 2013

Math
I have to factor 15x^2+2x-24 How can I do this?
January 3, 2013

Chemistry
The half-life of hafnium-156 is 0.025 s. how long will it take a 560 g sample to decay to one-fourth it's original mass?
December 11, 2012

Chemistry
If the half life of Iodine-131 is 8.10 days, how long will it take for 120.0 g to decay to 7.50g?
December 11, 2012

Chemistry
Thallium-208 has a half life of 3.053 min. How long will it take for 120.0 g to decay to 7.50 g?
December 11, 2012

Chemistry
If 100.0 g of carbon-14 decays until only 25.0 g of carbon is left after 11,460 y, what is the half-life of carbon-14?
December 11, 2012

History
How did the Civil War affect the home front in the north and south?
December 10, 2012

History (Industrial Revolution)
Can you give me an outline of the Industrial Revolution?
December 8, 2012

Calculus
When an electronics store prices a certain brand of stereos at p hundred dollars per set, it is found that q sets will be sold each month, where q2 + 2 p2 = 41. a. Find the elasticity of demand for the stereos using implicit differentiation. b. For a unit price of p = 4 ($400...
December 4, 2012

Calculus
When an electronics store prices a certain brand of stereos at p hundred dollars per set, it is found that q sets will be sold each month, where q2 + 2 p2 = 41. a. Find the elasticity of demand for the stereos using implicit differentiation. b. For a unit price of p = 4 ($400...
December 3, 2012

new mexico
Kara drew a horizontal dashed line through the middle of a trapezoid parallel to the parallel sides.Did she create a line of symmetry?
November 29, 2012

5th grade math
i need help
November 27, 2012

Math
45
November 27, 2012

math
2100
November 27, 2012

math
working on adding unlike fractions
November 27, 2012

Physics
Joe wishes to hang a sign weighing 730 N so that cable A, attached to the store, makes a 30.0° angle, as shown below. Cable B is horizontal and attached to an adjoining building. What is the tension in cable B?
November 17, 2012

PLEASE HELP - DIVISORS PROB
3/5
November 15, 2012

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