Pre Calculus
21,812 results, page 17

Math HELPPP
In a survey of 2000 adults 50 years and older of whom 40% were retired and 60% were preretired, the following question was asked: Do you expect your income needs to vary from year to year in retirement? Of those who were retired, 33% answered no, and 67% answered yes. Of ... 
PreCalculus
Consider the chemical reaction aC2H6 + bCO2 + cH2O → dC2H5OH, where a, b, c, and d are unknown positive integers.? The reaction must be balanced; that is, the number of atoms of each element must be the same before and after the reaction. For example, because the number ... 
PRE  CALCULUS
A woman works out by running and swimming. When she runs, she burns 7 calories per minute. When she swims, she burns 8 calories per minute. She wants to burn at least 336 calories in her workout. Write an inequality that describes the situation. Let x represent the number of ... 
PreCalculus
An indoor physical fitness room consists of a rectangular region with a semicircle on each end. The perimeter of the room is to be a 200meter running track. a) Draw a figure that visually represents the problem. Let x and y represent the length and width of the rectangular ... 
Math (PreCalculus)
9t^4 + 6t^2 + 2 the problem is asking for the value of t at which the graph is at it's minimum. what i did was set t^4 to x^2 and t^2 to x. So that means I have 9x^2 + 6x + 2. Completing the square and the vertex formula gave me the same answer of 1/3 as x. So setting that ... 
PreCalculus
Water is spraying from a nozzle in a fountain forming a parabolic path. The nozzle is 10 cm above the service of the water. The water achieves a max height of 100 cm above the waters surface and lands in the pool. The water spray is again 10 cm above the surface of the water ... 
PreCalculus
The profit in dollars in producing x items of some commodity is given by the equation P=−11x2+346.5x−2612.5. How many items should be produced to break even?(If there are two breakeven points, then enter the smaller value of x. Your solution may not be an integer... 
COLLEGE CALCULUS. HELP!
the fundamental theorem of calculus, f(x)=∫(0,x) t^3+2t^2+ 2 dt, and find f"(x). my answer was: f'(x)=x^3+x^2 f"(x)=3x^2+2x it said its wrong. i don't know how solve with interval, ∫(0,x) 
PreCalculus
A local photocopying store advertises as follows. " We charge 14 cents per copy for 150 copies or less, 6 cents per copy for each copy over 150 but less than 230, and 3 cents per copy for each copy 230 and above. " Let x be the number of copies ordered and C(x) be the cost of ... 
Calculus  Fundamental Thm of Calc
Suppose F(t) is an antiderivative of t^{3}. Then F'(t)= t^3. According to the Second Fundamental Theorem of Calculus, x ∫ (t^3)dt = ??? 1 Answer using the function F 
Precalculus
So a computer virus has been created via Corporate email. Let t=0 be the time of the first 100 infections, and at t=17 minutes the population of infected computers grows to 200. Assume the antivirus companies arent able to identify the virus or slow its progress for 24 hours... 
Calculus
Need an answer to this Calculus Question. I keep getting this type of question wrong. Thanks. Differentiate the Function: y = (3x1)^2(2x^4)^2 y = 
Calculus
Apply the concepts of calculus (limits and derivatives) to describe the graph y = sec(x). Include a quality graph 
PreCalculus
The paddle wheel of a boat measures 16 feet in diameter and is revolving at a rate of 20 rpm. The maximum depth of the paddle wheel under water is 1 foot. Suppose a point is located at the lowest point of the wheel at t=0. 1) Write a cosine function with phase shift 0 for the ... 
PreCalculus
The paddle wheel of a boat measures 16 feet in diameter and is revolving at a rate of 20 rpm. The maximum depth of the paddle wheel under water is 1 foot. Suppose a point is located at the lowest point of the wheel at t=0. 1) Write a cosine function with phase shift 0 for the ... 
PreCalculus
The paddle wheel of a boat measures 16 feet in diameter and is revolving at a rate of 20 rpm. The maximum depth of the paddle wheel under water is 1 foot. Suppose a point is located at the lowest point of the wheel at t=0. 1) Write a cosine function with phase shift 0 for the ... 
PreCalculus
The paddle wheel of a boat measures 16 feet in diameter and is revolving at a rate of 20 rpm. The maximum depth of the paddle wheel under water is 1 foot. Suppose a point is located at the lowest point of the wheel at t=0. 1) Write a cosine function with phase shift 0 for the ... 
Calculus
estimate the absolute maximum and minimum values of f if any, on the stated interval, and then use calculus methods to find the exact values: f(x)=10ln(x^2+1)8x; [0,3] 
calculus
Verify the identity: arctanx + arctan(1/x)=∏/2 using calculus theory. (Hint: Differentiate the left hand side of the identity) 
Calculus
I need help with these two review calculus problems for my final exam. What is the derivative of a). (5x^2+9x7)^5 b). Lne^x^3 For a. I got 50x+45(5x^5+9x7)^4 For b. I got 3x^2 Can you verify please? 
PreCalculus
The surface ares S (in square meters) of a hot air ballon is given by s(r)=4 pi r^2 where r is radius of balloon (in meters). If the radius r is increasing with time (in seconds) according to the formula r(t) = 2/3t^3, t is greater than or equal to 0, find the surface area S ... 
Math Pre calculus
A community birdwatching society makes and sells simple bird feeders to raise money for its conservation activities. The materials for each feeder cost $5, and the society sells an average of 20 per week at a price of $9 each. The society has been considering raising the ... 
PreCalculus
A local photocopying store advertises as follows. " We charge 14 cents per copy for 150 copies or less,6 cents per copy for each copy over 150 but less than 230, and 3 cents per copy for each copy 230 and above. " Let x be the number of copies ordered and C(x) be the cost of ... 
History. Please Help!!
Which of the following was the most significant development in the evolution of prehistoric Native American cultures? a. The development of fire based technology because it allowed prehistoric people to invent pottery. b. The development of agriculture because it allowed pre... 
calculus
using the fundamental theorem of calculus what is the derivative of the definite integral from x^3 to sqrt x of (sqrt t) sin t dt 
Calculus
use te fundamental theorem of calculus to evaluate the integral Integral [0, pi/3] sin^2(x)dx I'm confused on what F(x) should be 
pre calculus
1.)A utility company has the following rate schedule for natural gas usage in a city’s business district: Monthly service charge: $8.80 Per therm service charge 1st 25 therms : $0.6686/therm Over 25 therms: $0.85870/therm (a) What is the charge for using 25 therms in one ... 
Calculus I Theorem
I factored and simplified dy/dx of 192x^5 + 96x^3 + 12x all the way down to x^2 = u = (1/2) and (1/6). How does the result illustrates part 1 of the Calculus Fundamental Theorem? 
PreCalculus
Carmen rides her bicycle at a constant rate to the market. When she rides her bicycle back home along the same route, she bikes at threequarters the rate she biked to the market. At any given time, t, the distance biked can be calculated using the formula d = rt, where d ... 
statistics
Given the ensuing well drilling data, answer the following. [Reference: #4.78, page 172] • .30 (30%) probability of a productive well absent test information • Predrilling ballistics test ‘s affirmative result correctly predicts a productive well .70 of the time • Pre... 
Calculus  Find volume of cylinder
There is a cylindrical tank lying horizontally on the ground, its diameter is 8 feet, and length is 25 feet, the depth of the water currently in the tank is 2 feet. (1 gallon=231 cubic inches) How many gallons of water are in the tank? How many gallons of water will it take to... 
Calculus: Derivatives
I'm having trouble understanding what derivatives in calculus (instantaneous speed) is. Can someone please explain it to me, or provide some easy links to learn from? Thanks! 
Calculus
for the function F(t)=ln(t^2), let f(t)=F'(t). Write the integral from a to b of f(t) dt and evaluate it with the fundamental theorem of calculus. the integral from 1 to 3 ___ dt= __ 
Calculus  Fundamental thm of Calc
Use the Fundamental Theorem of Calculus to find the derivative of f(x)=∫[4,x^2]((1/4)t^2−1)^15 dt 
Math  TwoStep Inequalities  Please Help
I need help with this one, please. Which of the following is in the solution set of the inequality –3 > –3t + 6? A. 1/3 B. 1/3 C. 4 D. 4 I did a PreTest for my lesson, and it says I got this one wrong. However, it doesn't say which one I picked. For this one, is C ... 
Pre calculus
A 100 foot tall antenna sits part way up a hill. The hill makes an angle to 12 degrees with the horizontal. In other words, if you were going to walk up the hill, you would walk at an angle of 12 degrees. To keep the antenna stable, it must be anchored by 2 cables.The distance... 
statistics
Pre study scores versus post study scores for a class of 120 college freshman english students were considerated. The residual plot for the least squares regression line showed no pattern. The least squares regression line was y^=0.2+0.9x withwith a correlation coefficient r... 
Precalculus; urgent ! Please help !
1.Graph the polar equation r=32sin(theta) 2. Find the polar coordinates of 6 radical 3,6 for r > 0. 3. Find the rectangular coordinates of (7, 30°). 4. Write the rectangular equation in polar form. (x – 4)2 + y2 = 16 5. Write the equation –2x + 6y = 7 in polar form. 6... 
PreCalculus
You are taking a flight from Daytona Beach to St. Louis. There is a stopover in Atlanta. The bearing from Daytona Beach to Atlanta is N 38.3 degrees W. The bearing from Dayton directly to St. Louis is N 43.4 degrees W. The distance of the first leg of the trip from Daytona to ... 
Math
Eight people are put into pairs and enter a room with a large table with four pairs of chairs (2 chairs and a lot of space then 2 more chairs and a lot of space and so on) Though they could sit anywhere they had to sit with there assigned partner. In How Many ways could the ... 
PreCalculus
A car manufacturing company (the Company) can produce a car for $3000.00 and a truck for $5000.00. Suppose "C" cars and "T" trucks are sold to the dealer at markups, respectively, of 20 and 30 percent. If the Company made a profit of $27 million on sales of $137 million in ... 
PreCalculus
The treatment of a certain viral disease requires a combination dose of drugs D1 and D2. Each unit of D1 contains 1 milligram of factor X and 2 milligrams of factor Y, and each unit of D2 contains 2 milligrams of factor X and 3 milligrams of factor Y. If the most effective ... 
Precalculus
Find the slope of the line passing through the points at (a, a+3) and (4a, a5). 2) Together, two printers can print 7500 lines if the first printer prints for 2 minutes and the second prints for 1 minute. If the first printer prints for 1 minute and the second prints for 2 ... 
Precalculus
Find the slope of the line passing through the points at (a, a+3) and (4a, a5). 2) Together, two printers can print 7500 lines if the first printer prints for 2 minutes and the second prints for 1 minute. If the first printer prints for 1 minute and the second prints for 2 ... 
Calculus I
Hello! I am taking Calculus I and am in Sec. 4.3 of Stewart's 7th Edition. I ran across a problem that I don't understand the mechanics of, could someone show me? Thanks a bunch! For what values of the numbers a and b does the function f(x)= axe^{b(x^2)} have the maximum value... 
Math (Trig/precalculus)
some stars are so far away that their position appear fixed as earth orbits the sun. other stars, however, appear over time to shift their positions relative to the background of "fixed" stars. suppose that the star shown below appears to shift through an arc of theta = 0 ... 
Calculus
This is a calculus homework question but in reality the problem here is understanding the algebra. Find the Critical Numbers of f(x) = x^(3/5)(4x) The product rule gives x^(3/5) + (123x)/(5x^(2/5) My booklet explains that simplifying this gives you 128x / (5x^(2/5). How ... 
PreCalculus
Which is the polar form of the parametric equations x=5cos(theta) and y=5sin(theta) ? a. r= 5(theta) b. r= 5 c. r= 25 cos (theta) sin (theta)***** d. r= 25cos^2 (theta) + 25sin^2 (theta) Which is the polar form of the parametric equations x=4t and y=t^2? a. r= 16 tan (theta) ... 
PreCalculus
Trigonometric Functions, Radian Measure ∏ < will be using this for pi Using exact values, convert to radians ( hint use fraction of ∏) 90° = 90°*∏/180° = 1∏/2 ^^would it be right to also call it 2∏ radians? Determine the angle at the ... 
algebra 1
The Question Writing Commitee consists of seven volunteers from around the country who are amazingly dedicated to the Mathcounts program. This past weekend, was the last meeting for this particular group of question writers. Before the meeting, they are put into pairs, eith ... 
PreCalculus
The table below shows a frequency distribution of the number of pickup trucks sold at 85 truck dealerships in Maine over an 18month period. Number of trucks sold/Number of dealerships: 7090/2 90110/11 110130/39 130150/17 150170/9 170190/7 Find the interval about the ... 
PreCalculus
The table below shows a frequency distribution of the number of pickup trucks sold at 85 truck dealerships in Maine over an 18month period. Number of trucks sold/Number of dealerships: 7090/2 90110/11 110130/39 130150/17 150170/9 170190/7 Find the interval about the ... 
PreCalculus
An investor has $100,000 to invest in three types of bonds: shortterm, intermediateterm, and longterm.How much should she invest in each type to satisfy the given conditions? Shortterm bonds pay 4% annually, intermediateterm bonds pay 5%, and longterm bonds pay 6%. The ... 
PreCalculus
For a boat to float in a tidal bay, the water must be at least 2.5 meters deep. The depth of the water around the boat, d(t), in meters, where t is measured in hours since midnight, is d(t)=5+4.6sin(0.5t) Use three decimal places in all intermediate calculations. (a) What is ... 
PreCalculus
A 15N force acting at 15 degrees north of east and a 18N force acting at 79 degrees north of west act concurrently on an object. What is the magnitude and direction of a third force that produces equilibrium on the object? Show sketch and work.  xcomponent:: 15*cos(15 ... 
Pre calculus
PrecalculusGive an example of three functions f,g,h none of which is a constant function such that? PrecalculusGive an example of three functions f,g,h none of which is a constant function such that? foh=goh but f is not equal to g I tried with many functions but... 
PreCalculus/Trigonometry
Help please Tracy has a cell phone plan that provides 250 free minutes each month for a flat rate of $29. For any minutes over 250, Tracy is charged $0.35 per minute. Which of the following piecewise functions represents charges based on Tracy's cell phone plan? A. f(x)={29,x ... 
childhood
it has been propsed that there is a tendency for parent to trat full term babies better than preterm babies a big reason is ? a. that a full term infants don't cry as much. b. that the behavior of pre term babes is more annoying and irratible c. that pre term infants demand ... 
PreCalculus
. Margaret is planning to invest up to $22,000 in certificates of deposit at City Bank and People’s Bank. She wants to invest at least $2,000 but no more than $14,000 at City Bank. People’s Bank does not insure more than a $15,000 investment, so she will invest no ... 
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 answer to... 
Precalculus HELP PLASE !
1.Write the rectangular equation in polar form. (x – 4)2 + y2 = 16 2.Write the equation –2x + 6y = 7 in polar form. 3.Graph the polar equation 2 = r cos(theta – 20°). 4. Write the polar equation in rectangular form. r = –12 cos 
PreCalculus
A ball is thrown vertically upward with an initial velocity of 64 feet per second. The distance(in feet) of the ball from the ground after t seconds is s=64t16t. At what time will the ball strike the ground? For what time t is the ball more than 28 feet above the ground. The ... 
PreCalculus
Can someone please help me with the following question. 1) The weight of an object above Earth can be modeled by a function of the form w(h)=(r/r+h)^2*"w , where r is the radius of Earth 0" (approximately 3950 miles)," h" is the distance above Earth's surface, and "w is the ... 
CALCULUS 2
Use calculus to find the volume of the following solid S: The base of S is an elliptical region with boundary curve 9x^2+4y^2=36. Crosssections perpendicular to the xaxis are isosceles right triangles with hypotenuse in the base. 
Calculus
Set up, but do not evaluate, the integral which gives the volume when the region bounded by the curves y = Ln(x), y = 1, and x = 1 is revolved around the line y = 3 I got the integral from 1 to 2.718 of pi(1)^2pi(ln(x))^2 Is this correct or is there a trick I'm missing ... 
PreCalculus
Hello! Can someone check and see if these answers are correct? Thanks! 1.) If a line with slope of 1/2 is perpendicular to another line, then the slope of the other line is 2. TRUE or FALSE? (I choose True) 2.) If Segment QR  Segment TU and the slope of Segment TU is 3, ... 
PreCalculus
Hello! I wanted to know if my answers are right or not? Thanks! :) 1.) Segments AB and CD have the following endpoints. Determine whether the segments are parallel, perpendicular or neither. A (3, 0), B (2, 2), C (1, 4), D (3, 1) My answer: Parallel 2.) Segments AB and CD ... 
PreCalculus
Hello! I wanted to know if my answers are right or not? Thanks! :) 1.) Segments AB and CD have the following endpoints. Determine whether the segments are parallel, perpendicular or neither. A (3, 0), B (2, 2), C (1, 4), D (3, 1) My answer: Parallel 2.) Segments AB and CD ... 
Pre Calculus 12
Another sine/cosine question i don't get in vancouver on certain day, high tide is 20m at 2am, the next low tide is 8m at 6am, what an equation that represents height (h)of water at any time (t)since midnight) what is the height of water at 8:45AM? What is height of water at 8... 
Math (Precalculus)
The Fiedler family has up to $130,000 to invest. They decide that they want to have at least $40,000 invested in stable bonds yielding 5.5% and that no more than $60,000 should be invested in more volatile bonds yielding 11%. How much should they invest in each type of bond to... 
PreCalculus
Your computer supply store sells two types of laser printers. The first type, A, has a cost of $86 and you make a $45 profit on each one. The second type, B, has a cost of $130 and you make a $35 profit on each one. You expect to sell at least 100 laser printers this month and... 
pre calculus honors
An object moving vertically is at the given heights at the specified times. Find the position equation s = 12 at^2 + v (small o) t + s (small o) for the object. At t = 1 second, s = 161 feet At t = 2 seconds, s = 98 feet At t = 3 seconds, s = 3 feet a. s=−8t^2−t&#... 
PreCalculus
The Gateway Arch in St. Louis, Missouri is not a parabola but a shape known as a catenary. The name is given to the shaoe formed by the Graph of the hyperbolic cosine (cosh). The arch has a height of 625 feet andna span of 600 feet. The hyperbolic cosine is defined as: Cosh x... 
CalculusReiny
Calculus  Reiny, Friday, December 23, 2011 at 6:59pm I read that as (4a^21)/(4a^216) * (2a)/(2a1) , my brackets are necessary = (2a+1)(2a1)/( 4(a+2)(a2) * (2a)/(2a1) the (2a)/(a2) are opposite, they will give you the 1 so.. = (2a+1)/(4(a+2)) , again you have to ... 
PreCalculus(Trigonometry)
An 8m boom is used to move a bundle of piping from point A to point B. Determine the exact vertical displacement of the of the boom when the operator moves it form 30 degrees to 60 degrees. (Just need work checked)  I drew two triangles ... 
calculus
Quadratic function written in standard form where a, b, and c are constants such that a is not zero. f(x)= ax^2+bx+c Using calculus find the vertex of the parabola formed by this quadratic function. Determine under what conditions this vertex is a maximum or minumum (using ... 
prealgebra
What is (+3)(7)= 
Pre algebra
f(g+3+h) 
PreAlgebra
X5 x X4 
pre algebra
2x+3y=6 
PreAlgebra
7(p3)+2p=24 
preal
5(2x3)+8=9 how do you solve this? 
PreAlgebra
i can help 
PreCal
xy=2 {{x^2=3+y^2}} 
prealgebra
8a+6(a+7)=1 
prealgebra
is x+3x 4x or 3x^2? 
pre algebra
52 
Pre Calc
How do I do this?... Sq Rt[(9*Sq Rt(3x^2))] 
pre algbra
88*66 
pre algebra
9r5(r+6)=8r2 
pre algebra
 2 + 5 = +3 
prealgebra
0.6x+ x ¡Ü1.4x1 
prealgebra
8x(4x+7)=5 
prealgebra
3 1/2 * 1 1/2 
pre calc
135e^2x=3 
Pre Algebra
6x15>57 
Pre Calc
h t t p : / / w w w . j i s k h a . c o m / d i s p l a y . c g i ? i d = 1 2 5 8 1 5 2 7 6 5 
pre algebra
1/2 +(2/3 / 3/4) +(4/5 x 5/6)= 
pre algebra
11/16 + 3/16 = 
pre algebra
what is 5(2x3)+8=9