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November 27, 2014

Homework Help: Math: Calculus

Recent Homework Questions About Calculus

Post a New Question | Current Questions

CALCULUS
Hi guys can you help me! Please teach me step by step.. I really need it. pls! Thank you......... A swimming pool is 12 meters long, 6 meters wide, 1 meter deep at the shallow end, and 3 meters deep at the deep end. Water is being pumped into the pool at ¼ cubic meter ...
Friday, October 17, 2014 at 11:35am

Algebra/Pre-calculus (Quadratic Equations)
A theatre company allows a group of 10 people to buy theatre tickets at a price of $28 per person. For each person in excess of 10, the price is decreased by $2 per person for everyone down to a minimum of $10 per person. What number of people will produce the maximum revenue ...
Friday, October 17, 2014 at 10:35am

Calculus
A tray of lasagna comes out of the oven at 200°F and is placed on a table where the surrounding room temperature is 70°F. The temperature T (in °F) of the lasagna is given by the function T(t)=e^94.86753-t)+70 , 0 ≤ t, where t is time (in hours) after taking ...
Friday, October 17, 2014 at 10:34am

calculus
6) The function f(x)=4x3−18x2−480x−2 is decreasing on the interval ? Enter your answer using the interval notation for open intervals. It is increasing on the interval(s) ? The function has a local maximum at ?
Friday, October 17, 2014 at 10:27am

calculus
A bright light on the ground illuminates a wall 12 meters away. A man walks from the light straight toward the building at a speed of 1.1 m/s. The man is 2 meters tall. When the man is 4 meters from the building, how fast is the length of his shadow on the building decreasing...
Friday, October 17, 2014 at 10:21am

calculus
2) Let g(s)= t(4−t)^1/2 on the interval [0,2]. Find the absolute maximum and absolute minimum of g(t) on this interval. Enter DNE if the absolute maximum or minimum does not exist. The absolute max occurs at t= . The absolute min occurs at t=
Friday, October 17, 2014 at 10:21am

calculus
f(x)=x2(x−24). So f is decreasing (and f′ is negative) on the interval (0,a) for a= ?
Friday, October 17, 2014 at 10:20am

CALCULUS
1. A rectangular package to be sent by a postal service can have a maximum combined length and girth (perimeter of a cross section) of 108 inches. Find the dimensions of the package of maximum volume that can be sent. (Assume the cross section is square.)
Friday, October 17, 2014 at 10:05am

Calculus
Suppose a ball is thrown straight up into the air, and the height of the ball above the ground is given by the function h(t) = 6 + 37t – 16t2, where h is in feet and t is in seconds. At what time t does the ball stop going up and start returning to earth?
Friday, October 17, 2014 at 9:53am

diff calculus
1.) triangular corner lot has perpendicular sides of lengths 120 feet and 160 feet. Find the dimensions of the largest rectangular building that can be constructed on the lot with sides parallel to the streets.
Friday, October 17, 2014 at 7:26am

calculus
f(x)= 3+4xe^{-5x}complete the sentences concerning the function a) the function f is decresing on the iterval...... b) the function f is increacing on the interval c) the function f is concave down on the interval d) the function f is concave up on the interva
Friday, October 17, 2014 at 1:07am

calculus
can you find a sequence{an} such that {an} diverges, and the series of an converges? justify
Friday, October 17, 2014 at 1:06am

calculus
If f(x) = 3 cos^2(x) − 6 sin(x) 0 ≤ x ≤ 2π Find the intervals of increase and decrease, the intervals of concave up and concave down, local maximum values, local minimum values, and inflection point
Friday, October 17, 2014 at 1:04am

Calculus
The population of a colony of bacteria is modeled by the function p(x)=50(e^-x - e^-x^2)+10 ,for 0 ≤ x, where population P is in thousands, x is in hours, and x = 0 corresponds to the moment of introduction of a certain chemical into the colony's environment. At ...
Thursday, October 16, 2014 at 11:54pm

Calculus
The population of a colony of bacteria is modeled by the function p(x)=50(e^-x - e^-x^2)+10 , for 0 ≤ x, where population P is in thousands, x is in hours, and x = 0 corresponds to the moment of introduction of a certain chemical into the colony's environment. At ...
Thursday, October 16, 2014 at 11:52pm

Calculus..
Two particles are moving in straight lines. The displacement (meters) of particle 1 is given by the function s(t)= cos(4x), where t is in seconds. The displacement (meters) of particle 2 is given by the function s(t)= t^3/3-t^2/2 +2(t) , where t is in seconds. Find the first ...
Thursday, October 16, 2014 at 11:28pm

AP Calculus
In the answer space below, provide the larger of the two positive integers that add up to 60 and have the largest possible product.
Thursday, October 16, 2014 at 10:37pm

AP Calculus
If 600 cm2 of material is available to make a box with a square base and a closed top, find the maximum volume of the box in cubic centimeters. Answer to the nearest cubic centimeter without commas. For example, if the answer is 2,000 write 2000.
Thursday, October 16, 2014 at 10:36pm

calculus
Find the point on the plane z = 6x + 9y + 1 closest to the point P = (1, 0, 0). Hint: Minimize the square of the distance. (x, y, z) =
Thursday, October 16, 2014 at 9:41pm

calculus
find the coordinates of the centroid bounded by y=25x^2 and y=4. the region is covered by a thin flat plate
Thursday, October 16, 2014 at 9:36pm

Calculus
Derivative of the implicit Function: arctan(x^5y)=xy^5 Here is where I am at. I am pretty frustrated: arctan(x^5y)-xy^5=0 1/1+(x^5y)^2 * (d/dx(x^5)*y+x^5*d/dx(y))-(d/dx(x)*y^5+x​*d/dx(y^5))=0 1/(1+x^5y)^2 * (5x^4y+x^5dy/dx) - (y^5+x^5y^4dy/dx) (5x^4y)/[(1+x^5y)^2] + (x^...
Thursday, October 16, 2014 at 2:52pm

Calculus
A 13 foot ladder is leaning against the house when it's base starts to slide away. By the time is 12 feet from the house the base is moving at the rate of 5 ft/sec. 1.How fast is the top of the ladder sliding down the wall at that moment? 2. At what rate is the angle theta...
Thursday, October 16, 2014 at 8:26am

calculus
Find the maximum and minimum values of f(x, y) = xy on the ellipse 8\!x^{2} + y^{2} = 9.
Thursday, October 16, 2014 at 12:36am

calculus
Find the center of mass in the 1st quadrant of the circle x^2+y^2=4 where rho(x,y)=k(x^2+y^2) Thanks.
Wednesday, October 15, 2014 at 8:14pm

REALLY HARD CALCULUS PROBLEMMMM PLEASE HELP ME???
A circular swimming pool has a diameter of 16 m, the sides are 3 m high, and the depth of the water is 2.5 m. How much work (in Joules) is required to pump all of the water over the side? (The acceleration due to gravity is 9.8 m/s 2 and the density of water is 1000 kg/m 3 .) ...
Wednesday, October 15, 2014 at 4:31pm

Integral Calculus
A force of 4 pounds is required to hold a spring stretched 0.1 feet beyond its natural length. How much work (in foot-pounds) is done in stretching the spring from its natural length to 0.6 feet beyond its natural length?
Wednesday, October 15, 2014 at 4:28pm

calculus
Use iterated integral to find the area enclosed by r=2sin2(theta). How do i graph this?
Wednesday, October 15, 2014 at 12:15pm

Calculus problem (PLEASE HELP!!)
The diameter of a human pupil in millimetres is given by D= (2 + 4x^-0.3) / (1 + x^-0.3) where x is the luminance measured in candelas per square metre. Using this function,what is the diameter of the pupil when there is no light? What happens to the diameter of the pupil as ...
Wednesday, October 15, 2014 at 9:02am

Calculus (Need help)
Not sure how do do this. Please help? Find all values of a and b so that the function is continuous for all x E R. f(x)= −3a + 4(x^5)b x ≤ −1 { ax − 2b −1 < x < 1 3x^2 − bx + a x ≥ 1
Wednesday, October 15, 2014 at 7:21am

Calculus I
lim x→ ∞ of e^(−x) sin√x A little lost. Help would be appreciated.
Wednesday, October 15, 2014 at 5:49am

pre-calculus
You are given a pair of equations, one representing a supply curve and the other representing a demand curve, where p is the unit price for x items. -45 x^2 - 74.5199999999995 x + 15921.36 - 1224.72 p = 0 and 54 x^2 + 1743.12 x + 13880.16 - 6940.08 p = 0 a. Identify which is ...
Tuesday, October 14, 2014 at 10:01pm

pre-calculus
It has been found that the supply of lamps varies linearly with its price. When the price per item was $ 94.67 ,64 items are supplied; When the price was $ 134.67 , 124 items are supplied. How many lamps are supplied when the price per item is $ 118.00 ? What is the lowest ...
Tuesday, October 14, 2014 at 9:58pm

Calculus
Find all values of a and b so that the following function is continuous for all x ∈ R. f(x) = −3a + 4x^5(b) x ≤ −1 ax − 2b −1 < x < 1 3x^2 − bx + a x ≥ 1
Tuesday, October 14, 2014 at 6:32pm

calculus
The half-life of Radium-223 is 11.43 days. If a sample has a mass of 400 mg, find the mass (in mg) that remains after 6 days
Tuesday, October 14, 2014 at 4:04pm

Foundations and Pre-Calculus Math 10
Find the radius of a cone with a height of 3m and a volume of 30m cubed. So far I have 90m cubed / 3m = pi(r^)3m/3m. Then I get stuck. Help! I'm really bad at math. ):
Tuesday, October 14, 2014 at 1:30pm

pre-calculus
The Hotel Florence has 550 rooms. Currently the hotel is filled . The daily rental is $ 700 per room. For every $ 14 increase in rent the demand for rooms decreases by 7 rooms. Let x = the number of $ 14 increases that can be made. What should x be so as to maximize the ...
Monday, October 13, 2014 at 10:51pm

calculus
Use diferenciales para estimar la cantidad de estaño en una lata cerrada de este metal con diámetro de 8 cm y altura de 12 cm, si el estaño tiene 0.004 cm de grosor.
Monday, October 13, 2014 at 7:12pm

Pre-calculus
You are given a pair of equations, one representing a supply curve and the other representing a demand curve, where p is the unit price for x items. 80 p + x - 380 = 0 and 84 p - x - 40 = 0 Identify which is the supply curve and demand curve and the appropriate domain. Put the...
Monday, October 13, 2014 at 6:23pm

calculus
Find the dimensions of the rectangular box having the largest volume and surface area 60 square units
Sunday, October 12, 2014 at 6:49pm

Calculus
Gravel is being dumped from a conveyor belt at a rate of 25 ft3/min, and its coarseness is such that it forms a pile in the shape of a cone whose base diameter and height are always equal. How fast is the height of the pile increasing when the pile is 6 ft high? (Round your ...
Sunday, October 12, 2014 at 6:25pm

calculus
The volume of a cube is increased from 729 cubic centimetres to 849.285 cubic centimetres. Use differentials to determine: a) by approximately how many centimetres the side length of the cube increases ? B) by approximately how many square centimetres does the surface area of ...
Sunday, October 12, 2014 at 3:18pm

Calculus
A water trough is 9 m long and has a cross-section in the shape of an isosceles trapezoid that is 40 cm wide at the bottom, 80 cm wide at the top, and has height 40 cm. If the trough is being filled with water at the rate of 0.3 m3/min how fast is the water level rising when ...
Sunday, October 12, 2014 at 2:21pm

calculus
use differentials to determine by approximately how many square centimeters does the area of a square table increase if its diagonal is increased from 4 centimeters to 4.092 centimeters the question is The area of table increases by approximately (??) square centimetres
Saturday, October 11, 2014 at 5:52pm

statistics
On this semesters final exam, john scored 72 on his calculus exam and 53 on his statistics exam. The z score for both exams was the same. Which on would he do better on? a. calculus b.statistics c. the exam scores are equivalent
Saturday, October 11, 2014 at 5:52pm

Calculus
The volume of a cube is increased from 729 cubic centimetres to 849.285 cubic centimetres Use differentials to determine : (a) by approximately how many centimetres does the side length of the cube increase? (b)by approximately how many centimetres does the surface area of the...
Saturday, October 11, 2014 at 3:50pm

calculus
the surface area of a cube is increased from 24 square centimeters to 26.016 square centimeters . use differentials to determine: (1) by approximately how many centimeters does the side length of the cube increase? (2) by approximately how many cubic centimeters does the ...
Saturday, October 11, 2014 at 2:55pm

statistics
On this semesters final exam, john scored 72 on his calculus exam and 53 on his statistics exam. The z score for both exams was the same. Which on would he do better on? a. calculus b.statistics c. the exam scores are equivalent
Friday, October 10, 2014 at 8:17pm

calculus
Verify the given linear approximation at a = 0. Then determine the values of x for which the linear approximation is accurate to within 0.1. (Enter your answer using interval notation. Round your answer to two decimal places.) tan x ≈ x
Friday, October 10, 2014 at 6:20pm

pre-calculus
You are given a pair of equations, one representing a supply curve and the other representing a demand curve, where p is the unit price for x items. 80 p + x - 380 = 0 and 84 p - x - 40 = 0 a. Identify which is the supply curve and demand curve and the appropriate domain. Put ...
Friday, October 10, 2014 at 5:06pm

economics
First,label the following scenarios as to whether they would create a producer or consumer surplus. Then, after you have labeled each scenario, calculate the ensuing surplus. Claire is trying to sell her used calculus textbook online. She asks for $150 or best offer and is ...
Friday, October 10, 2014 at 11:09am

calculus
f(x,y)=2xe^y-3ye^-x derive second order
Friday, October 10, 2014 at 1:07am

Calculus
Would you please check my answer to make sure I did it right? Bus travel, a bus company finds that monthly costs for one particular year were given by C(t) = 100 + t^2 dollars after t months. After t months the company had P(t) =1000 +t^2 passengers per month. How fast is its...
Thursday, October 9, 2014 at 5:19pm

pre calculus
sinB + cosB cotB = cscB
Thursday, October 9, 2014 at 9:28am

Calculus
Some cowboys plan to build a rectangular corral in a canyon. They have 500 feet of fencing to use for three sides of the rectangle (the canyon wall is used for the 4th side). a) What is the maximum area that they can fence in? b) What are the dimensions of the rectangle?
Wednesday, October 8, 2014 at 8:33pm

statistics
Correction On this semesters final exam, john scored 72 on his calculus exam, (class distribution (u=65, \?=3.57)\) ) and 53 on his statistics exam (class distribution :u=49, ?=2.04. Which exam should he get the better grade. z1=72-65/3.57=1.960 Z2=53-49/2.04=1.960
Wednesday, October 8, 2014 at 8:11pm

statistics
On this semesters final exam, john scored 72 on his calculus exam, (class distribution (u=65, \?=3.57)\) ) and 53 on his statistics exam (class distribution :u=49, ?=2.04. Which exam should he get the better grade. z1=72-65/3.57=1.960 Z2=53-49/3.57=1.120
Wednesday, October 8, 2014 at 8:03pm

Calculus I
cos(2x)−cos(x) = -((sin^2)x + 1/4) Need help solving.
Wednesday, October 8, 2014 at 11:38am

CALCULUS HELP NEEDED ASAP!
Having a lot of trouble with this one: Q) Tidal volume is the volume of air displaced in the lungs between inhalation and exhalation (the amount of air in a breath). The residual volume is given by the remaining in the lungs even after the deepest exhalation (ie the minimum ...
Wednesday, October 8, 2014 at 11:36am

pre-calculus
A machine worth $10,000 new and having a scrap value of $1000 is to be depreciated linearly over an 18-year life. What will be the value of the machine after 9 years?
Tuesday, October 7, 2014 at 11:03pm

calculus
An airplane flys at a constant altitude of 2 miles and a constant speed of 600 miles per hour on a straight course that will take it directly over a kangaroo on the ground. How fast is the angle of elevation of the kangaroo's line of sight increasing when the distance from...
Tuesday, October 7, 2014 at 10:09pm

Statistics
On this semesters final exam, john scored 72 on his calculus exam, (class distribution (u=65, \σ=3.57)\) ) and 53 on his statistics exam (class distribution :u=49, σ=2.04. Which exam should he get the better grade. z1=72-65/3.57=1.960 Z2=53-49/3.57=1.120
Tuesday, October 7, 2014 at 9:48pm

Calculus Please Help!
Not sure how to do this. Asked before but it was hard to type out the symbols in the equation, so I have a screenshot below. exactly Please help! s.yimg(.)com/hd/answers/i/36cad89caaff40​61bf38ed04166cbd76_A.png?a=answers&mr=0&​x=1412733166&s=...
Tuesday, October 7, 2014 at 7:54pm

Calculus question
It looks very complicated and I do not know how to even start. Any help would be immensely appreciated. A pendulum has a mass, m, suspended from a rod of length L. At the time t = 0, the pendulum is pulled through an angle θ0 > 0 to the right and given an initial ...
Tuesday, October 7, 2014 at 6:55pm

Calculus
An airplane flys at a constant altitude of 2 miles and a constant speed of 600 miles per hour on a straight course that will take it directly over a kangaroo on the ground. How fast is the angle of elevation of the kangaroo's line of sight increasing when the distance from...
Tuesday, October 7, 2014 at 6:46pm

Calculus help please
I have to evaluate the following: tan((sin^-1)(2/7)) and sin^-1 (sin(17pi/6)) Please help.
Tuesday, October 7, 2014 at 6:44pm

Calculus
slope of tan line to the ellipse is -4x/y for x^(2)/4+y^(2)/16 Are there any points where the slope is not defined? (Enter them as comma-separated ordered-pairs, e.g., (1,3), (-2,5). Enter none if there are no such points.) slope is undefined at
Tuesday, October 7, 2014 at 5:05pm

calculus 1
Suppose that a person’s blood pressure at time t in seconds is given by p(t) = 100 + 18 sin (7t). (a) During each heartbeat, what is the systolic pressure (maximum blood pressure) and the diastolic pressure (minimum blood pressure)? (b) According to this model, how many ...
Tuesday, October 7, 2014 at 3:17pm

Calculus
Simplify the expression cot (cos−1(x)). Not sure how to do this.
Tuesday, October 7, 2014 at 3:12pm

calculus
Find the slope of the tangent line to the curve (2x+4y)^1/2+(2xy)^1/2=13.4 at the point (6,5).
Tuesday, October 7, 2014 at 11:43am

Calculus
Suppose that two boats leave a dock at different times. One heads due north, the other due east. Find the rate at which the distance between the boats is changing when the first boat is 56 miles from the dock traveling at a speed of 35 miles per hour and the second boat is 20 ...
Tuesday, October 7, 2014 at 11:36am

AP Calculus
Using the definition of derivative find f'(x) when f(x) = (1/sqr x) + x.
Tuesday, October 7, 2014 at 9:34am

Physics
A pistol is shot upwards at an angle of 37 degrees above horizontal, with an initial velocity of 375m/s. What height does it reach? What is its horizontal range? (I pretty much know what formulas to use, but I'm not quite sure HOW to use them.. Also you should know that ...
Monday, October 6, 2014 at 11:57pm

Pre Calculus
Using Descartes' Rule of Signs how can you determine the number of positive and negative zeros (roots) a polynomial may have?
Monday, October 6, 2014 at 7:05pm

Pre Calculus
If f(x)=-4x^3 +5x^2 +8 and c=-2 is c a factor of x?(Use the Factor Theorem)
Monday, October 6, 2014 at 5:41pm

Calculus
A light is hung 15 ft above a straight horizontal path. If a man 6 ft tall is walking away from the light at the rate of 5 ft/sec, how fast is his shadow lengthening and at what rate is the tip of the man’s shadow moving?
Monday, October 6, 2014 at 10:48am

Timerate problem(calculus)
Sand is being dropped at the rate 10 metercube/min onto a conical pile. If the height of the pile is always twice the base radius, at what rate is the increasing when the pile is 8 m high?
Monday, October 6, 2014 at 10:46am

calculus
How to solve by completing the square? 1. 4(c+3)^2=1/4 2. (2p-5)^2=1/4 3. 2w^2-3w-3=0
Monday, October 6, 2014 at 12:54am

Calculus
let F(x) = f(2x) and suppose that the derivative of F(x) = x^(2). Find the derivative of f(2x).
Sunday, October 5, 2014 at 11:46pm

Calculus
So here is the question: Find and equation of the tangent line to the graph: 4)f(x)=e^(2x) passing through the point (0,0) I find derivative being f'(x) =2e^(2x) Then m = f'(0) = 2 put into point slope formula: (y-y1)=m(x-x1) y-0 = 2(x-0) which comes out to y=2x 0=2x...
Sunday, October 5, 2014 at 10:27pm

calculus
Implicit diff. y^2 + 4xy +4y^2=40 2yy'+ _______ + 8y*y=0 I am confused with the 4xy. Would you write this out to be 4x*y'+4y OR 4x*4y' + 4y*4x'? Please help
Sunday, October 5, 2014 at 3:46pm

Calculus
Integrate sqrt(x^2 + x) dx I have completed the squares and got x^2-x = (x+1/2)^2 -1/4 Now i dont know how to proceed, plz help me!
Sunday, October 5, 2014 at 3:42am

Calculus
I have y = sin^2(3^(x)) which I rewrite as y = (sin(3^(x)))^2 I got the derivative using the chain rule as the following y' = 3(sin(3^x))^2 (cos(3x)) (3^(x)(ln(3)) Can anyone confirm whether this is right/wrong? Thanks
Sunday, October 5, 2014 at 12:40am

Calculus
Find the equation of the tangent to the curve y=3x^2+4x which makes a 45 degree angle with the negative x-axis
Saturday, October 4, 2014 at 6:48pm

pre-calculus
It has been discovered in a certain state that the relationship between the number of snow shovels demanded varies linearly with its price. When the price per item was $ 38 ,2200 items were demanded; When the price was $ 49 , 2125 items were demanded. Determine the price per ...
Friday, October 3, 2014 at 9:40pm

Calculus
Find all values of x if any where the tangent line to the graph of the given equation is horizontal? y= x - sqrt (x) I am very confused would I work it like this? y = x - x^-1/2 then set x = 0? Please explain. thank you!
Thursday, October 2, 2014 at 11:45pm

pre calculus
Use Hooke's Law for springs, which states that the distance a spring is stretched (or compressed) varies directly as the force on the spring. A force of 265 newtons stretches a spring 0.15 meter. (a) What force is required to stretch the spring 0.2 meter? (Round your ...
Thursday, October 2, 2014 at 7:46pm

Calculus
True or false: a) if f(x) is continuous at a, then the limit of f(x) as x approaches a exists b) if the limit of f(x) as x approaches a exists, then f(x) is continuous at a My answer: a) false b) true
Thursday, October 2, 2014 at 7:33pm

calculus
Find the volume of the solid obtained by rotating the region bounded by the given curves about the specified axis. x+y=4,x=5−(y−1) 2 ;
Wednesday, October 1, 2014 at 11:38pm

Stat
Thirty randomly selected students took the calculus final. If the sample mean was 89 and the standard deviation was 6.2, construct a 99% confidence interval of the mean score of all students. Assume that the population has a normal distribution
Wednesday, October 1, 2014 at 4:46pm

Pre-Calculus/Trig...
Help Please For the function defined by: f(x)= (x^2,x≤1) (2x+1,x>1) Define f(0). and also how would i graph f(x)?
Wednesday, October 1, 2014 at 11:06am

Pre Calculus
e^-x sqrt(3e^2x -5/4) = e^x No idea how to approach this.
Wednesday, October 1, 2014 at 6:55am

Calculus
Hi. I need help with finding the derivative of the function: y= [(sec^7 x)/7] - [(sec^5 x)/5] Thanks!
Tuesday, September 30, 2014 at 9:38pm

Calculus
Hi! I need help finding the derivative of this function. f(x)= ln [(x(x-1))/(x-2)] Thank you.
Tuesday, September 30, 2014 at 9:05pm

Pre-Calculus/Trigonometry
Express the following function, F(x) as a composition of two functions and f and g. f(x)= x^2/(x^2+4)
Tuesday, September 30, 2014 at 4:29pm

Pre-Calculus/Trigonometry
For the sequence an = 4n + 5: find: the first five terms: find the sum of the first 25 terms: is it a arithmetic sequence? If so how can you tell, if not, why not?
Tuesday, September 30, 2014 at 4:20pm

Pre-Calculus/Trigonometry
Solve the following system of equations algebraically. Verify the solution by using matrices. 8x-2y=5 -12x+3y=7
Tuesday, September 30, 2014 at 1:23pm

Pre-Calculus/Trigonometry
For f(x)= 1/(x-5) and g(x)= x^2+2, find: a. (f o g)(x) b. (g o f)(6)
Tuesday, September 30, 2014 at 12:58pm

Stat
Thirty randomly selected students took the calculus final. If the sample mean was 89 and the standard deviation was 6.2, construct a 99% confidence interval of the mean score of all students. Assume that the population has a normal distribution. what formula do i use????
Tuesday, September 30, 2014 at 12:36pm

Pre-Calculus/Trigonometry
for f(x)= 1/(x^2-3), find: a. f(3) b.f(2+h)
Tuesday, September 30, 2014 at 12:01pm

Pre-Calculus/Trigonometry
Solve the following system of equations algebraically. Verify your solution by using matrices. 3x-y=0 5x+2y=22
Monday, September 29, 2014 at 7:22pm

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