# Pre- Calculus

21,396 results, page 55

### Pre calc

Someone please help me prove these A) cos^4x-sin^4x=cos2x B)tanx=sin^2x/1+cos^2x Please and Thank you

### Pre calc

Someone please help me prove these A) cos^4x-sin^4x=cos2x B)tanx=sin^2x/1+cos^2x Please and Thank you

### maths pre ap

Krispy Krunch cereal is 49% sugar. about how many ounces of sugar are in a 16 oz box of Krispy Krunch?

### PRE-CAL

How can I solve this questions and get those answers???? answers sec 13pi/4=? =>-ã(2) csc 13pi/4=? =>-ã(2) sec (-pi/6)=? =>2ã(3)/3

### pre algebra

Triangle XYZ has vertices X(- 1, 1), Y(- 3, 1), and Z( -2, 5). Reflect triangle XYZ in the y-axis. Find the vertices of the image

### math pre calc

solve sin theta = 1/2,90 degrees less than theta less than 180 degrees

### Pre cal

In a sinusoidal,function, how do you determine whether or not y= sin4(x) has a period of 2 pi If it is equal to 2 pi then what is a sinusoidal function that is not equal to 2 pi

### Geometry

A pre-image segment with endpoints (3,-2) and (4,2) is dilated to the image segment with endpoints (9,-6) and (12,6). What is the scale factor for the dilation?

### Pre Algebra

A spoke on the bike wheel is about 12 inches long. The diameter of the wheel is about how many inches?

### pre calc

Find the values of b such that the system has one solution. x^2 + y^2 = 36 y= x+b and then they give me an answer box b=_________ (smaller value) b=_________ (larger value) i have absolutely no idea how to even begin this and what they are asking. could some please help and ...

### pre-calc please help!!

an open box with a volume of 1500cm cubed is to be constructed by taking a piece of cardboard of 20 cm by 40 cm, cutting squares of sides length x cm from each corner and folding up the sides. show that this can be done in two ways, and find exact dimensions of the box in each...

### Chemistry

Consider the data below Temperature(0C) Diffusivity(m2/s) 736 2 x 10-13 782 5 x 10-13 835 1.3 x 10-12 Given this data, determine the activation energy for the diffusion process (units of Joules per atom or molecule) in this material and the pre-exponential factor (use units of...

### Finance

12. Your current $155,000 mortgage calls for monthly payments over 25 years at an annual rate interest rate of 6 percent. If you pay an additional $50 each month beginning with the first payment, how much interest expense do you save by pre-paying?

### calculus

hi! just needed help on an FRQ for ap calculus ab. let me know if you have any questions for me. I'm just really confused as far as what I am meant to do. If you could walk me through it that would be amazing. THANKS!! A population is modeled by a function P that satisfies the...

### Math

Two hundred tickets were sold for a concert. Forty percent of the tickets were pre-sold. How many tickets were sold at the door?

### Calculus

I am doing the AP calculus review, these are the questions I have no Idea on how to do: 1. if 0<= k <=pi/2 and the area under the curve y-cosx from x=k to x=pi/2 is 0.2, then k= 2. let F(x) be an antiderivative of (ln x)^4/x If F(1)=0, then F(9)= 3. What is the equation ...

### Pre-Calc (Point of Inter.)

A diagonal of a cube is a line segment of maximum length whose endpoints are vertices of the cube. To the nearest degree, what is the angle of intersection Ѳ, 0 < Ѳ <= 90° between two distinct diagonals of the same cube?

### pre-algebra..7th grade

Story Problem Some friends are recording songs on a CD. The first 1/5 of the CD has Alex's songs.The next 12 minutes of songs are Henrique's. 1/3 of the time is Brian's songs. Sally has 32 minuites. How many minutes of music are there in all?

### pre cal

A movie theater seats 400 people. For any particular show, the amount of money the theater makes is a function m(n) of the number of people, n, in attendance. If a ticket costs 2 dollars, find the domain and range of this function

### Pre-Calculas

The voltage E of an alternating current electrical circuit can be represented by the sinusoidal function E = 220 cos( t), where E is the measured in volts and t is measured in seconds. How long does it take the alternating current to complete one full cycle?

### Pre-Algerbra

Someone help explain? Justin wants to use 188 ft of fencing to fence off the greatest possible rectangular area for a garden. What dimensions should he use? What will be the area of the garden? ~ A. 89 ´ 99 ; 8811 ft B. 92 ´ 96 ; 8832 ft C. 94 ´ 94 ; 8836 ft D. 93 ´ 95 ; ...

### Pre-Calc/Trig

A body was found at 6 a.m. outdoors on a day when the temperature was 50oF. The medical examiner found the temperature of the body to be 66oF. What was the approximate time of death? Use Newton's law of cooling, with k = 0.1947. A. Midnight (12 a.m.) B. 5 a.m. C. 2 a.m. D. 3 a.m.

### Pre-Calc

An airplane is flying at a speed of 250 mph at an altitude of 4 miles. The plane passes directly above a radar station at time t = 0. What is the distance s between the plane and the radar station after four minutes?

### Sixth Grade Pre Algebra

Can someone please help me ? I think I'm supposed to put all the like terms together, but I can't remember how to do this. I asked my mom but she can't remember. Solve for x 6x - 6 equals 2x - 26 Solve for x 2x - 1 equals -5x - 85 Thank you very much. Can you explain?

### Social Studies

I have to search and compare these civilization... ･pre 20th century Japan ･Incan It's my Social Studies project😲💦 Would you recommend me some good websites in English?

### pre calc

A cardboard box has a square base and a square top. The height of the box is 13 inches. Express the surface area A (the sum of the areas of all six sides of the box) in terms of the length l of the box. Can someone please help me

### calculus

A) How do you prove that if 0(<or=)x(<or=)10, then 0(<or=)sqrt(x+1)(<or=)10? B) So once that is found, then how can you prove that if 0(<or=)u(<or=)v(<or=)10, then 0(<or=)sqrt(u+1)(<or=)sqrt(v+1)(<or=)10? * calculus - Damon, Saturday, April 3, ...

### Pre Calculas

True or false (logx)^2=2logx True or false in56/in7=in8 i got true for the first one and false on the second im sorry for posting today but i just need someone to check

### Pre-Algebra

Mistu purchased a basketball hoop for her driveway from a sporting goods store. After the sales tax rate of 5.5% was applied, the total cost came to $179.35.How much money would Mistu have saved if she had used a coupon good for 10% discount?

### Pre- AP Physics

The earth exerts a force of 1400 N on an orbiting communications satellite that is 35 mi above the Earth. What is the magnitude of the force the satellite will exert on the earth? Answer in units of Newtons

### Pre-Calc

Determine the center and the radius of the following circle: x^2+y^2+6x-4y-5=0 I got for the radius 3(sqrt2) I got for the center (-3,2) Can you please tell me if I am correct? The radius seems wierd.

### Pre algebra

mr.smith needs a photo measuring 4 inches wide and 6 inches long to be an enlarged proportional so that the width is 10 inches. what would be the length if the enlarged photo?

### Pre-algebra

Hi need help answering this question? In your own words, define the term equation and then explain what it means to solve an equation. Give an example of an equation and its solution. Explain why it is the solution.

### Pre-Algebra

Montel spends $0.75 every time he plays his favorite video game. Montel has $10. write and solve an inequality that shows how many times Montel can play the video game.

### pre calc

Water is poured into a container in the sape of a right circlar cone with raiud 4t an heigh 16 feet. Express the volue (V) of the water in the cone as a funtio of the heigh (h) of the water. thanks

### pre-algebra

atoms contain charged particles called protons and electrons. each proton has a charge of +1, and each electron has a charge of -1. A sulfur ion has 16 protons and 18 electrons. find the net charge. Thank-You

### math( pre-algeba)

there were 6 purple socks and 4 orange socks in a drawer. Zucky picked one sock without looking(or replacing the first). What is the probability that he picked 2 purple socks?

### Pre Algebra

I can purchase a 30-ounce bottle of juice for $1.80 or a 64 ounce bottle of juice for $3.20. How much do I save per ounc by purchasing the larger bottle? 30 divided by 1.80= .06 4 dividec by 3.20= .05 Subtraction .06 by .05 Answer = 0.1

### all

Im going to college for rn. i have to take pre req. before entering the nursing program. I received my ged in 2008 can you give me advice to help me improve studying habits so that i can succeed in requirements? The subjects are mth100,eng101,bio201-202,220,psy200&210,sph 106&107

### Pre-Ap Chemistry

This is my last question and this one really threw me for a loop. I know that the temp has to be converted to kelvin which would make it 315.4 What volume of oxygen gas can be collected at 0.683 atm pressure and 34.0◦C when 42.4g of KClO3 decompose by heating, according ...

### chem

I'm suppose to calculate the weight percent per volume (grams pre 100cm3) of ethanoic acid in a commercial sample of vineger from the following: (a) 0.4321g of pure momoprotic acid( formula weight 204.2 amu) required 23.45cm3 of naoh for neutralizalion.

### Pre-calc Math

Use the Law of Sines to solve for all possible triangles that satisfy the given conditions. (If an answer does not exist, enter DNE. Round your answers to one decimal place. Below, enter your answers so that ∠B1 is smaller than ∠B2.) a = 78, b = 109, ∠A = 24° Find : ∠...

### American Government

As the country has grown and evolved, so too has the Executive Office of the President and the independent agencies. Give four specific examples demonstrating how the evolution of the executive branch has mirrored the evolution of the nation. Include at least one pre-twentieth...

### calculus - ratio test

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)] | = lim (n->infinity) | ((e^n)(e^1)(n!)) / ((n+1)(n!)(e^n)) | ..the e^n...

### calculus

find the first derivative of f(t)= (1-t)^(1/2)

### Calculus

Solve. (A) 2sin^2 x = 1 (B) tan^2 x = 3

### Calculus

Find the derivative if y^3 + y = 2cosx

### Calculus

Find the derivative if x^3 + 4xy^2 - y^4 = 7

### Calculus

Find the derivative if y=sin^-1(3x)

### Calculus

Find the derivative if y=sec^-1(x+3)

### Calculus

Find the derivative if y=sec^-1 (x+3)

### Calculus

Find the derivative if y=sin^-1 (3x)

### calculus

equation of the normal to the graph of f(x)= x/2x-3

### calculus

is (x)/(x^2-9) an even or an odd function?

### math calculus

Please explain how it is (ln 4) ¡Ò^8 2 x^-1 dx= (ln 8) ¨C (ln 2) =(ln 4)

### calculus

calculate Äƒ/Äx and Äƒ/Äy. ƒ(x,y) = xy² + x²y

### Calculus 3

Calculate the double Integral e^(y^2) dA D = {(x,y)| 0 <= x <= y <= 1}.

### Calculus

What is the tens digit of 0! + 1! + 2! + 3! + ... + 2000!?

### calculus

If f is the antiderivative of g(x)=(x^3)/(1+x^5) such that f(1)=0, then f(5)=___.

### calculus

how would you differentiate this equation?? dy/dx + e^(x+y) = 0

### calculus

Assume x and y are functions of t. Evaluate dy/dt. xy - 5x + 2x^3 = -70; dx/dt=-5, x=2, y=-3

### calculus

Assume x and y are functions of t. Evaluate dy/dt. xy - 5x + 2x^3 = -70; dx/dt=-5, x=2, y=-3

### calculus - vectors

Show that x dot y = 1/2 ( |x + y^2| - |x|^2 - |y|^2 )

### college calculus

how do you integrate sqrt( x^2 - (x^2)(e^(-2x)) )?

### college calculus

how do you intergrate sqrt((1+((1/4)/(4-x^2)))

### Calculus - Integrals

What is the integral of arctan x?

### Calculus

I'm not sure how to solve the equation 5^x-12*(5^-x)-1=0

### calculus

This is stupid, but can anyone find the derivative of f(x)=8^(1-2x^2)?

### Calculus

What is the limit as x approaches -1 of x - 5 --------------------- 4x(squared)-6x+ 3

### calculus

Logarithmics: Ie: log3 3^11 : Evaluate? Thanks.

### math calculus

how to find derivate of: y=(-4x^2+8)/(x^2+2)^2

### Calculus

If f(x)=5x^3–2/x^4 find f'(x) I don't understand what I did wrong for this ((x^4)(4x+7)-(4x^3)(5x^3-2))/(x^4)^2

### calculus

How do I find the domain of: y=squareroot of x^3-3x^2 ?

### Calculus

f(x) = {x^3 - 1, x> or equal to -1 {2x,x<-1 find limit x->-1 f(x)

### calculus

given the functions: f(x) = x^2 - 1, g(x) = x/x + 2 Why is x^2 - 1/x^2 + 1 the equation of (g o f)(x)?

### Calculus

Does -csc^2(x)sin^2(x) equal -1?

### Calculus HS

Final ? - Let f(x) = x2-x-6/x g(x) = x-3, find (f+g)(x) (f-g)(x) (f/g)(x) Thanks again

### Calculus

1/f = 1/p + 1/q What is the rate of change of p with respect to q if q=2 and f=4?

### calculus

Prove that d/dx(cot x)= -csc^2x

### calculus

Differentiate the function f(x) = 186.5

### maths calculus

How to integrate (cos2x)^2?

### AP Calculus 1

find derivative of cos^4(x)^4

### 12th AP Calculus

find the dy/dx of: y=3(cscx)^3/2

### calculus

find the derivative of the function g(x) = (1 + 3x)^6(5 + x - x2)^8

### Calculus

Is sum of sin(pi/n) DV or CV? I don't understand why it is DV.

### Calculus

How do I prove that the series ln(n)/(3n) is divergent?

### calculus

integrate: square root of (4-x^2)

### Calculus

Is the series (8+1^n)/(1+2^n) divergent or convergent?

### Calculus

find the integral of x^2 - sec3xtan3x

### calculus

What is the derivative of square root x ?

### calculus

simplify: e^3lnx+4lny

### Algebra with calculus

Solve for n: I=nE/nr+R not sure how to do this

### Calculus

Find the intergral of 1/[cos(^2) x

### calculus

Evaluate the following sum: 10 E (–1)^n–1(1n^2–9n–3) n=4

### calculus

4. f(x)= 7-5x^4 What does x equal? what is the absoloute max?

### calculus

what's the limit as n goes to infinity of (2 + 4/n^2)^(1/3)

### calculus

What is the period of y=5 cos pi x and how do you find it?

### calculus

find the derivative for y= (tan^-1)e^x

### calculus

Find the derivative of f(x)=[lnx]^4