# Pre- Calculus

21,894 results, page 76-
## Pre-Cal/Trig

Explain how to solve the following question. Surveying: From a point A hat is 10 meters above level ground, the angle of elevation of the top of a building is 42 degrees and the angle of depression of the base of the building is 8 degrees. Approximate the -
## Advanced Industrial Hygiene

Air was sampled through 37mm PVC membrane filter for seven hours and thirty seven minutes. The initial air flow rate was pre-calibrated twice at 49.7 and 50.1 secnds per liter. What volume of air at STP (25 C and 760mm Hg) was sampled in liters? same -
## Pre-Algebra

Please help to solve to find x,y 1. y=7x-3 2. 4x+2y=8 Take the value of y in the first formula and substitute it for y in the second formula. Solve the second formula for x. Once x is found, solve for y in the second formula. Check by inserting both values -
## Pre-Cal

The population of Las Vegas, Nevada in 2000 was 478,000 and is increasing at the rate of 6.28% per year. At this rate, when will the population reach 1 million people? a)1.51 years b)2.32 years c)12.12 years d)10.84 years -
## Pre-Algebra

The grocery store sells kumquats for $4.25 a pound and Asian pears for $2 a pound. Write an equation in standard form for the weights of kumquats k and Asian pears p that a customer could buy with $12. -
## Pre-Calc-please check

Please check this for me expand (3z-2b)^5 using Binomial Theorem (a+b)^n = n on top sigma in middle k=0 to right (n/k)a^(n-k)b^k (3a-2b)^5 = 5 on top sigma in middle k=0 on bottom(5/k)(3a)^5-k(-2b)^k (5/0)(3a)^5(-2b)^0+(5/1)(3a)^4(-2b)^1 -
## PRE ALGEBRA

solution to electrical poles that carry electrical wire seem to get smaller the further away you are. Find the apparent height of each pole if the tallest pole is 50 feet tall and there is 100 feet between poles. -
## Pre-Calc

Fill in the blank; •In the process of polynomial division (Divisor)(Quotient)+_______=_______ •When a polynomial function f is divided by x-c, the remainder is _______. •If a function f, whose domain is all real numbers, is even and if 4 is a zero of -
## Pre Calc

I have no idea how to do this problem I thought you would have to do something with the diagonals but not sure... The parallel sides of a trapezoid are 4 and 10 centimeters long and the oblique sides are 8 and 12 centimeters long. Fi9nd the angles and the -
## pre-calc

The force, F, between two bodies of mass m1 kilograms and m2 kilograms whose centers of mass are a distance of r meters apart is given by the formula F = (Gm1m2)/ r2 where G is the gravitational constant of the universe. What are the units of the -
## pre calc

The number of customers that visit a local small business is 29,600 and has been continuously declining at a rate of 2.9% each year. What is the approximate number of customers that visit the business in 10 years -
## pre cal

find the standard form of the equation of a parabola with the vertex (0,0) and the directrix y=6 find the standard form of the equation of the ellipse with center (0,0) and foci at (+- 4square root 3, 0) and verticies (+-8,0) -
## Pre-Algebra

A fair number cube, numbered 1 though 6 is rolled 200 times. About how many times can it be expected to on the number 4? I tried to do 200 divided by 6 which is 33.3333333333 and then I did 100 divided by 6, so then I tried to use a ratio, but I could find -
## PRE-CALC HELP

Two boats leave the same port at the same time. One travels at a speed of 31 mi/h in the direction N 50° E and the other travels at a speed of 20 mi/h in a direction S 70° E (see the figure). How far apart are the two boats after one hour? (Round your -
## pre algebra 1

Sasha finished mowing lawns at 4:15 PM. It took 1^3/4 h to mow the first lawn. The second and third lawns she mowed each took 1^1/5 h. She took one 45-min break. When did Sasha begin mowing the first lawn? A. 10.05 A.M. B. 11:05 A.M. C. 11:21 A.M. D. 12:21 -
## Pre-calc

Determine a general formula (or formulas) for the solutions to the equation. Then determine the specific solutions (if any) in the interval[0,2π). 2sin^2θ+3sinθ+1=0 -
## Pre-Calc, Probability

From a deck of 52 playing cards, 7 cards are dealt. What are the odds of the following event occuring --4 From one suit, 3 from another The probability of the event occurring is also acceptable. But, the answer is 99/16722971 (as far as the odds go -
## Pre-Algebra

A 9 foot ladder leans against a building at a point 7 feet above the ground. At what height would a 15 foot ladder touch the building if both ladders for the same angle with the ground? Propotion? But I just get a decimal... -
## Pre-Cal

In terms of x, write expressions for the length, width, height, and volume of the boxes created in the activity. I just need an example, so i'll just give one box. X-1 length-20 width-14 height-1 volume-280 -
## english

For the Unit 1 Discussion Board assignment, you will: (1) select a topic from the list below, (2) develop a thesis statement from your topic selection and post your writing strategies for developing your thesis, (3) explore the features of the MyCompLab -
## pre calc

A navy destroyer is exactly 68 miles North of an aircraft carrier, which is travelling West 21 degrees North at 18 mph. what speed and bearing must the destroyer maintain if it is to reach the aircraft carrier in exactly 3 hrs? -
## 8th Grade Pre-Algebra

Hi, I really need some help with scientific notation. How do I convert large numbers like 108,000,000 and other numbers that are even larger than this to scientific notation? This is for a math project and even though I learned about this, it's still hard -
## math

Pre-Cal between 0 degree C and 30 degree C the volume V (in cubic centimeters) of 1kg of water at a temperature T is given by the formula. V=999.87-0.06426T+0.0085043T^2-0.0000679T^3 Find the temperature at which the volume of 1 kg of water is a minimum. -
## Pre Cal.

1. Identify the conic section represented by: 9y^2+4x^2 - 108y+24x= -144? Is it ellipse. 2. Find the coordinates of the vertex and the equation of the axis of symmetry for the parabola represented by: x^2 + 4x - 6y + 10 = 0. vertex: (-2 , 1) axis of -
## US History

3. The War of 1812 ended with a. a clear victory for the US b. a clear victory for Britain c. the removal of all British claims to land in North America d. a return to the pre-war boundaries between the US and British territories. D? Thanks -MC -
## pre ap chem

determine the partial pressure of hydrogen if it's collected over water at 23 degrees celsius and the system has a total pressure of 724 mmHg then determine the mole fraction of water vapor in the system -
## Pre-Algebra

Grade 7 students were surveyed to determine how many hours per day they spent on various activities. Eating is 8%, homework is 8%, sleeping is 33%, TV is 13%, socializing 13%, and school is 25%. About how many hours per day altogether were spent on -
## Pre-Algebra Math

A bank teller is counting his money and notices that he has an equal number of tens and twenties. He also had $147 in other bills. If the total value of the bills he has is $1,167, how many tens and twenties does he have What would be the equation in -
## Pre Algebra

A pot water at a temperature of 25°C is placed on a hot burner. The temperature increases at a rate of 15° per minute until it boils at 100° C. The water continues boiling at this temperature. What is the slope of the graph after the temperature reaches -
## Math 142 (Pre-Cal) (Circles)

A wheel spins through 29 revolutions per minute. Find the angular velocity and the linear velocity if the radius of the wheel is 1.8 feet. w=? (rad/min) v=? (feet/min) -
## pre-algebra

a field 480,000 m^2 is 160 m wide. What length of fencing is needed to enclose it? i thought you would just have to do A=lw 480,000= l(160) l= 3000 but the answer is wrong. the correct answer is in the six thousands. please help -
## Pre-Cal (Help Please!!!!)

[Note: i need help really badly. I only have 2 hours left] Find all solutions of the following equations. Be sure to check for extraneous solutions. show work 1). 3cosθtan^(2)θ-cosθ=0 2). tan (3θ)+1=0 -
## Pre Calc

The half-Life of radioactive earthium is 2651 years. Find how many years it will take 100 grams of earthium to decay to 10 grams. I know the equation is A=Ae^(-rt) I tried working it out but I think I am doing it wrong. I did 10=100e^(-r*2651) Can anyone -
## Government US

22. The phrase that best describes the shift in America’s world position from the pre- to the post- World War II eras is a. internationalism to isolationism. b. isolationism to internationalism. c. containment to isolationism. d. interventionism to -
## philosophy

o Which of the Pre-Socratic philosophers had the most compelling ideas? o Briefly summarize the philosopher’s idea or ideas. o Why do you find these ideas compelling? o Include a practical example of one of the philosopher’s ideas in your response. -
## Art

The Barbizon painters were known for their urban, studio created nudes true or false The Pre-Raphaelites advocated an urban, Parisian sophistication in their art: true or false -
## Pre calc

Thanks in advance for any help. I need help with this whole problem. The distance s(t) between an object and its starting point is given by the antiderivative of the velocity function v(t). Find the distance between the object and its starting point after -
## Art

The Barbizon painters were known for their urban, studio created nudes true or false The Pre-Raphaelites advocated an urban, Parisian sophistication in their art: true or false -
## philosophy

which pre-socratic philosopher had that most compelling ideas? Briefly summarize the philosophers idea(s). Why do you find these ideas compelling? Include a practical example of the philosophers idea in your response. -
## Pre-Algebra/Math8

whats the answer to this question:in a city, the record monthly temperature for july is 88°F. the record monthly low temperature is 30 °F. what is the range of temperatures for july? -
## pre-calc

a semicircle of radius r=3x is inscribed in a rectangle so that the diameter of the semicircle is the length of the rectangle 1. express the area A if the rectangke as a function 2 express the perimeter P of the rectamgle as a function of x -
## physics

Two 0.55 kg basketballs, each with a radius of 15 cm, are just touching. Ignore any other gravitational interactions. (a) How much energy is required to change the separation between the centers of the basketballs to 1.0 m? (b) How much energy is required -
## Pre-Calc

Let cis Θ = cos Θ + i sin Θ. Let z1 = 3 cis 25 and let z2 = 4 cis 115 Find z2^6 -
## pre-algebra

Nineteen members, or 38 members of the ski club are going on a ski trip. find the total number of members in the club. -
## Math, Pre-Calc

the original problem was: Solve: sin(3x)-sin(x)=cos(2x) so far i've gooten to: sin(x)(2sin(x)cos(x)-1)=cos^2(x)-sin^2(x) Where would I go from here? -
## Pre Calc - Probability

Let S = {2, 8, 14} be a sample space associated with an experiment. (a) List all events of this experiment. A) {2, 8}, {2, 14}, {8, 14}, {2, 8, 14} B) {2}, {8}, {14}, {2, 8}, {2, 14}, {8, 14} C) {2}, {8}, {14}, {2, 8}, {2, 14}, {8, 14}, {2, 8, D) 14} E) -
## pre cal

Approximate the following logarithms using the properties of logarithms given logb(2)=0.264, logb(3)=0.419, and logb(5)=0.614. logb(24) =? logb(100) =? logb(5b^3) =? -
## Pre-Calc Help!!!

Find sin x/2, cos x/2, and tan x/2 from the given information. cos x=− 4/5, 180° < x < 270° sin(x/2= cos(x/2)= tan(x/2)= -
## pre alg

jane is standing next to a tree. the tree casts a shadow that is 11.2 ft long. she is 5.6 ft tall and her shadow measures 3.8 ft. How tall is the tree? -
## pre-alg

point E is located at (-2,2) and point F is located at (4,-6). what is the distance between points E and F? A.)Square Rot of 52 B.)Square Roots of 28 C.)10 D.)Square Root of 20 -
## Pre-algebra (DESPRATE NEED OF HELP!)

A triangle has side lengths of (x+4), (4x-8), and (2x+8) units. If the perimeter of the triangle is at least 88 units, what is the minimum length of each side of the triangle? -
## CALCULUS. Check my answers, please! :)

The domain of f(x)=(1)/(sqrt(x^2-6x-7)) is (1, 7) [-1, 7] x > -1 or x < 7 ***{x < -1}U{x > 7} (-∞, -1]U[7, ∞) 2. In which of the following is y a function of x? I. y^2=9-x^2 II. |y|=x III. y=(sqrt(x^2))^3 I only II only III only -
## Pre-Algrebra

One gallon of liquid occupies 231 cubic inches. Write a rule that expresses the number of gallons g(c) as a function of the number of cubic inches c. Choices are: g(c)=c/231 g(c)=132/c g(c)=231c g(c)=132c -
## chemistry

How do I find out how many ml of NaOH i need to titrate H3PO4. I used the ice table to knock off the two protons but im using a .2200M NaOH and do not Know how to determine the volume needed before hand. In other words i need some pre-calculations for -
## pre calc

A navy destroyer is exactly 68 miles North of an aircraft carrier, which is travelling West 21 degrees North at 18 mph. what speed and bearing must the destroyer maintain if it is to reach the aircraft carrier in exactly 3 hrs? is it 226mph? -
## Pre-calc

Congruent squares are cut from the corners of a 20 in. square piece of tine, and the edges are turned up to make an open box. How large should the squares cut from the corners be in order to maximize the volume of the box? -
## Pre-Cal

Evaluate the following. Show you work: A). tan^-1(tan(5π/6)) B). cos^-1(cos(-π/4)) Can someone please show me the steps to evaluating this problem. I've been working this for 2 hours today and all of last night, I still can't seem to figure it -
## math- last time then i'm giving up

im sorry but this problem is part of a major grade i have in my pre-ap algerbrea 2 class.... ummm... okay lxl <--these are going to be absolute value bars. 1. Solve lax+bl <or equal to c for x in terms of a, b, and c where a>0 and c>0 2. Now -
## Math, Pre-calculas

From each corner of a square piece of cardboard, a square with sides of 3cm is removed. The edges are then up to form an open box. If the box is to hold 243cm^3, what are the dimensions of the original piece of cardboard? -
## helpppppppp

I have this problem abouth math pre algebra this is my problem I have 3 number that makes a total of 11 I have 1 4 6=11 in each way has to came out 11 up down side across and I have 2 more blanck spaces total of 3 its big square need help and I cant use -
## pre calc

A navy destroyer is exactly 68 miles North of an aircraft carrier, which is travelling West 21 degrees North at 18 mph. what speed and bearing must the destroyer maintain if it is to reach the aircraft carrier in exactly 3 hrs? is it 226mph? -
## Calculus AP

hi again im really need help TextBook: James Stewart:Essential Calculus, page 311. Here the problem #27: First make a substitution and then use integration by parts to evaluate the integral. Integral from sqrt(pi/2) TO sqrt(pi)of θ^3 -
## Math/Pre Algebra HELP ME!

1. What are the coefficients in the polynomial 5x^2 + 2x - 4? A. 5,2 B. -5,2 C. 5,2,-4 ** D. 5,-2,-4 For questions 2 and 3 add or subtract. 2. (m^2 - m - 4) + (m - 5) A. m^2 - 2m + 9 B. m^2 + 2m - 9 C. m^2 - 2m - 9 ** D. m^2 - 9 3. (5x^2 + x - 3) - (-2x^3 -
## Pre-Algebra [repost ]

I need help on these three questions BEFORE 10:00 PM. Please someone show me how to do them step by step! Solve the equation for y in terms of x then find the solutions of the equation for the given values of x. 1.x + y = -1 [values of x: 3, 1, -2] 2.x+ 4y -
## Pre-Algebra

Write the expression for a number used as a factor fifteen times being multiplied by the same number used as a factor ten times. Then, write the product as one power. Thanks, Michaela -
## Pre-Algebra

Frank had 25 meters of string. He cut off 480 centimeters that became tangled then used 98 centimeters to tie ul some tree branches. How many meters of string did Frank have left? -
## pre algerbra

question: write the expression for a number used as a factor seventeen times being multiplied by the same number used as a factor fourteen times.then write the product as one power? -
## Pre Algebra

A wooden railing is 82 feet long. It is to be divided into 4 pieces. Three pieces will be the same length, and the fourth piece will be 2 feet longer than each of the other three. Find the length of each piece. -
## Pre-Algebra

Write the expression for a number used as a factor fifteen times being multiplied by the same number used as a factor ten times. Then, write the product as one power. Thanks, Michaela -
## calculus - ratio test

Posted by COFFEE on Sunday, July 29, 2007 at 6:32pm. infinity of the summation n=1: (e^n)/(n!) [using the ratio test] my work so far: = lim (n->infinity) | [(e^n+1)/((n+1)!)] / [(e^n)/(n!)] | = lim (n->infinity) | [(e^n+1)/((n+1)!)] * [(n!)/(e^n)] | -
## pre cal

assuming that Earth is a sphere of a radius 6378 kilometers, what is the difference in the latitudes of Lynchbug, Virginia, and Myrtle Beach, South Carolina, where Lynchbug is 400 kilometers due north of Myrtle Beach? -
## pre-algebra

Use an inequality to solve the problem. A shopkeeper is making a triangular sign for his store front, but he must keep the sign under 20 square feet to adhere to the zoning laws. If the base of the sign is 20 feet, what is the maximum height of the -
## Administration

The local school system asks you to submit a proposa to do pre-employment physicals for sixty bus drivers. Wha financialor accounting inrmation do you need to submit a proposal? What will you charge the school bus system? -
## Math

I was thinking that I have to multiply but that doesn't make sense. However, I am terrible at story problems. A child's dose of medicine is 1/6 of a pre-measured dose cup. If the bottle of a medicine is the size of 9 doses, how many children's doses are -
## Pre Calculas

A GARDENER HAS 60' of edging. She wants to use it to enclose a 120 square foot rectangular area. She does not have to use up all of the edging. what are the possible lengths that a side of the rectangle can have? Answer using interval notation. Hint: if -
## Pre-Algebra

which of the following describes a situation in which a data set with a low mean absolute deviation is preferable? A. a car dealership sells cars at different prices B. a factory manufactures computers of different sizes and shapes. C. a food processing -
## The Inspection Process

In some states, real estate agents are legally required to A. back up the claims their clents make about home conditions. B. appraise the values of the properties they sell. C. hire home inspectors to perform pre0sale inspections. D. pay the fees the -
## The Inspection Process

In some states, real estate agents are legally required to A. back up the claims their clents make about home conditions. B. appraise the values of the properties they sell. C. hire home inspectors to perform pre0sale inspections. D. pay the fees the -
## calculus

I have to help teach this class tomorrow for my Senior Seminar Math class. The lesson is over Exponential and Logarithmic Functions and L'Hospital's Rule. I have all the problems needed to review this lesson, but i can not solve any of them. My teaching -
## pre-cal

A small ferris wheel: A student is riding a 20-m-diameter ferris wheel that is making three revolutions per minute. If there are eight equally spaced seats on the Ferris wheel, then what is the length of the arc between two adjacent seats? -
## Calculus

Find dy/dx implicitly in terms of x and y only for the following function; x+ 4xy=y^2 -
## Calculus

FIND THE LIMIT As x approaches 0: tan 5 x/sin 25 x -
## calculus

identify the type of curve and sketch the graph of y2-2x+6y+5=0 -
## Calculus

If the normal to f(x)= (3x/(1+x)) at (2,2) cuts the axes at B and C, determine the legnth of BC. -
## Calculus

Find dy/dx by implicit differentation. ysin(x^2)=-xsin(y^2) -
## Calculus

Minimize S=x+2y with xy=2 and both x and y > 0. Can somebody explain to me in words and numbers how to do this problem. -
## Calculus

Use continuity to evaluate. as x approaches 2, lim arctan((2x^2-8)/(3x^2-6x)) -
## Math/calculus

Tan 165° Use appropriate identity and evaluate -
## Calculus

Find the derivative. Simplify as much as possible. s(x)=(9-12x)/[(x/3)-(1/4)] Can someone explain this to me -
## Calculus

Which of the following functions grows the fastest as x goes to infinity? (2 points) f(x) = ex f(x) = 2x f(x) = 4x f(x) = e-2x -
## Calculus

lim as x approaches pi/4 of (1-cotx)/(cosx-sinx) -
## Calculus

find the limit. use L'Hopital's Rule if necessary. lim (x^2+3x+2)/(x^2+1) x -> -1 -
## Calculus help plz

Using the first rule of derivative find 8(x-y)12?? And how can i solve these y^x+x^y=17,x+y=5 -
## calculus

How do you determine the limit without substitution. ie. lim x--> -2 sqr(x-2) -
## Calculus

Find the limit. Use L'Hopitals Rule if necessary. lim (x^2+3x+2)/(x^2+x) x -> 0 -
## math/calculus

find the domain and range of the function f(x)=x^2-9/4x^2+x -
## calculus 2

How to solve the definite integral of(3x+pi)cos3xdx from [pi over6,pi over 3] -
## Calculus

Find the equation of the tangent to the curve y=sin^-1 (1/x) at x=2. Please help! -
## Calculus

Evaluate the indefinite integral: ∫ from 1 to 2 of ln (x²e^x) dx Thank you for your help!! -
## Calculus

Let f(x)=3x^5+5x^3+15x+15. Use Rolle's Theorem to show that f(x) has exactly one root.