# Pre- Calculus

21,152 results, page 54

### Calculus

What is the unit vector of v: <-6, -8>?

### Calculus

If f(x) = 2xsqrt(x-6), what is the value of (f^-1)(40)?

### calculus

y'? 1.y=arctan(a+x/1-ax); a is constant 2.y=e^x-e^-x/e^x+e^-x

### Calculus

What is the absolute value of: 3 - 8i? A. 9 B. 64 C. √55 D. √73

### Calculus

Suppose that f(x+h)-f(x) =-4 h x^2 - 1 h x + 4 h^2 x + 3 h^2 -3 h^3. Find: f^1(x)

### Calculus

Evaluate ∫tan(3x)dx

### Calculus

Sinx=e^y , 0 <x <pi, what is dy/dx in terms of x?

### Calculus

If f(x)=(x^2+1)^(2-3x), then f'(1) = -3/2ln(2)-1/2 Is this correct?

### Calculus

Find f'(1) if f(x)=(h(x))^3 Chart: x= -3,-2,-1,0,1,2,3 g(x)= 0,1,3,2,0,-2,-3 h(x)= 1,2,0,3,-1,-2,0 g'(x)= 1,2,-1,-2,-2,-1,0 h'(x)= 0,-3,-2,3,-2,0,1

### Calculus

How do you fine the derivative of (x-3)^-3

### calculus

limx-->3 sin 3x/4x

### Calculus

Integrate x^2/(sqrt(x^2-25)dx

### Calculus

Integrate sqrt(16+x^2) dx

### Calculus

What is y=-2/7x-1 in standard form?

### Calculus

What is the function y (x) if it statisfies Y"=6 y'(1)=4 and y (1)=6

### calculus

Evaluate the integral. from 1 to 5 (ln(x))^2/x^3 dx.

### Calculus

Find f if f''(x)=2+cos(x) f(0)=5 f(pi/2)=−3

### Calculus

Find the derivative f'(x)= : f(x)=∫[2,x] ((1/2)t^2-1)^8 dt

### Math - Calculus

g(x)=∫[6x,3x] (u+2)/u-5) du Find g'(x)

### Calculus

What how do you compute the sum of 1/2 + 1/4 + 1/8 + 1/16 + 1/32 +++ 1/2N ?

### Calculus

What how do you compute the sum of 1/2 + 1/4 + 1/8 + 1/16 + 1/32 +++ 1/2N ? ..

### calculus

Differentiate the function. f(x) = e^7

### Pre-Algebra

in- 0 1 2 3 4 X out- 1 4 10 0's output is 1 and 1's output is 4, then 3's output is 10....wat is the rule to this??? and wat are the outputs for 2, and 4?

### Pre-Algebra

in- 0 1 2 3 4 X out- 1 4 10 0's output is 1 and 1's output is 4, then 3's output is 10....wat is the rule to this??? and wat are the outputs for 2, and 4?

### Pre-Calc

Show that cos(pi - θ) = -cos θ for every angle θ

### Pre algebra

the temperature in canada is -8 degrees. the temperature drops 5 degrees. what is the current temperature?

### Pre Cal.

So I posted these...but no one answered them. Are they right? Solve 4sin^2 x + 4sqrt(2) cos x-6 = 0 for all real values of x. My answer: (pi/4)+2(pi)k, (7pi/4) + 2(pi)k Solve 2cos^2 x-5cosx+2=0 for principal values of x. My answer: 60 and 300 degrees

### Pre-Cal

Hi, can someone please solve this step-by-step for me? I really don't get it... Directions: Use the quadratic formula to solve the equation in the interval [0,2PI). Then use a graphing utility to approximate the angle x. 4cos^2x-4cosx-1=0 thanks.

### INDO european languages

The Indo-european parent language was first spoken by a pre-historic people in: A} Western europe B} Middle east C} Northern india D} Southeastern europe .The answer i choose is C. Am i correct?

### 7th grade Pre algebra( math honors0

triangle ABC is smilar to triangle FED Ab= 12 Ac=15 De=4 df=5 1. write three equal ratios to show correspnding sides are prosportional. 2. find the value of bc 3. find the value of ef.

### pre-algerbra

A farmer is building a square pen 21 feet on each side. He puts one post at each corner and one post every three feet in between. how many posts will he use. please give equation

### Pre-Cal

[Note: I'm still having issues with identities with regard to trig] Verify the Trig. identities: (a). cot(x+y)=(cotxcoty-1)/(cotx+coty) (b). sin0(cot0+tan0)=sec0 [Note: 0=theta symbol]

### calculus

find the circular cylinder of greatest volume that can be inscribed in a right circular cone with altitude 20 cm and diameter of base 10 cm. please answer in detail ..... so at a height h, the radius is 5(1-h/20) check that. VolumeCone= PIr^2 H = PI h * 25(1-h/20)^2 find dV/dh...

### pre-cal: one-to-one property

i am not sure how to do these problems... *use the one-to-one property to solve the equation for x* 1. 2^(x-2)= 1/32 2. e^(x^2-3)=e^2x

### 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)=? =>2ã(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 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 ...

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?

### 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 know I posted this problem earlier but I don't think it will be seen anymore since it's almost at the end of the page: Find the total mass of the triangular region with coordinates (-1,0),(0,4),and (1,0). All lengths are in centimeters, and the density of the region is (x)=5...

### 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...

### 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?

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?

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

### 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?

### 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- 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 ...

### 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, ...

### 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...

### Pre Algebra

the problem is that I have to find the length of x. Here's what they say: Find the missing length, when the perimeter is 9x+11 then here are the length that are given on the shape: 2x+3 and 3x+1 How could I solve this?

### 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?

### Math 156

A child's dose of medicine is 16 of a pre-measured dose cup. If the bottle of medicine is the size of 9 dose cups, how many children's doses are there in the bottle?

### Pre-Algebra

30 ft pipe is broken in three pieces. The shortest piece is 6ft. shorter than the longest piece. The medium length piece is 2/3 the length of the longest

### Finance

If I have \$40,000 of pre-tax what are the differences between \$1,000 tax credit versus a \$1,000 tax deduction for a single taxpayer in the 25% tax bracket?

### Pre-cal

The number cis 75 + cis 83 + cis91 +...+ cis 147 is expressed in the form r cis(theta), where 0 <= theta < 360. Find theta in degrees. I need help.

### Pre-Calc

A quadratic function has its vertex at the point (-5,-2). The function passes through the point (-8,-10). Find the quadratic and linear coefficients and the constant term of the function.

### 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 alegra

A product that cost 2,000 increase by 5% in June. The new June price of the product increased by 5% on December 1st. How many dollars did the product increase by Dec 1. I don't have a clue! Can you please help

### pre calc

the hour hand of a clock is 5 inches long and the minute hand is 6 inches long. Determine the distance between the tips of the hand at 11:40 p.m. please help i don't understand how to do this. if you work it out this will help alot

### pre algebra help

An apple falls from a 28 foot tree. The height of the apple, in feet, after t seconds of falling, can be found using the polynomial 16t 2 + 28. Find the apple's height after 0.5 second.

### Pre ALgebra

If a pizza with a diameter of 12 inches costs \$10.99, based on area, about how much should a 15-inch pizza cost? (Hint: Be sure to use the area of the pizza in your proportion, not the diameter.)

### Pre-calsulus

a twin-engine cessna is heading on bearing of 35 degrees with an air speed of 180 mph. if the wind is out with a bearing of 90 degrees at 40 mph, then what is the bearing of this course? what is the ground seed of the airplane?

### Pre Cal.

1. Use half-angle identity to find the exact value of cos165. MY ANSWER: (-1/2)sqrt(2+sqrt(3)) 2. Solve 2 sin x + sqrt(3) < 0 for 0<= x<2pi. MY ANSWER: (4pi/3)< x < (5pi/3) 3.Write the equation 2x+ 3y-5=0 in normal form? (-2sqrt(13)/13)x - (3sqrt(13)/13)y + ...

### children's literature

With pre-school children, a first step in engaging children in the reading process is to read stories in which characters are faced with a decision to be made and in which there is: A. no clear-cut answer. B. no solution. C. a set of choices provided. D. an obvious solution. i...

### 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...

### Pre-AP Physics

A flatbed truck is carrying a heavy crate. The coefficient of static friction between the crate and the bed of the truck is 0.47. What is the maximum rate at which the driver can slow and avoid having the crate slide against the cab of the truck?

### Pre-Calc

Workers are designing a TV receiving dish in the shape of a paraboloid of a revolution, the factory sent them a paraboloid that is ten feet across at the opening and three feet deep. What is the best place the receiver can be placed for the best reception?

### Pre Cal

An open box is formed from an 80cm by 80cm peice of metal by cutting four identical squares from the corners and folding up the sides. Express the volume of the box in terms of x. Then describe how you could find the maximum possible volume.

Use synthetic division to show that x is a solution of the third-degree polynomial equation, and use the result to factor the polynomial completely. List all the real zeros of the function. x^3 - 28x - 48 = 0 Value of x = -4 Please help!!Thank you

### Pre-Calc/Trigonometry

You place a cup of 205oF coffee on a table in a room that is 72oF, and 10 minutes later, it is 195oF. Approximately how long will it be before the coffee is 180oF? Use Newton's law of cooling: 1 hour 25 minutes 15 minutes 45 minutes

### Chemistry Pre-AP

What volume of oxygen gas can be collected at 0.565 atm pressure and 48.0◦C when 42.9g of KClO3 decompose by heating, according to the following equation? 2 KClO3(s) ∆−−−−→2KCl(s) + 3O2(g) MnO2

### Pre-Calc.

You want to make an investment in a continuously compounding account over a period of 20 years. What interest rate is required for your investment to double in that time period? Round the logarithm value to the nearest hundredth and the answer to the nearest tenth.