# Pre- Calculus

21,931 results, page 97-
## mathematics-calculus-derivatives

. Try this. If y=cosx find dy/d5x please show workings #thanks -
## Calculus

I'm having trouble with this one. Problem: Find the equations for the planes parallel to x+2y-2z=1 and two units away from it. -
## Calculus

How do I solve e^(ax) = Ce^(bx), when a does not equal b? I know the answer has something to do with natural log, and that a has to be connected to b and c, but I don't know what. -
## Calculus

Determine the equation of the tangent line to the curve y = 2x²-1 at the point where x = -2 -
## calculus

Let g(x)=|cos x-1|. The maximum value attained by g on the closed interval [0, 2pi] is for x equal to A) -1 B) 0 C) pi/2 D) 2 E) pi I think its pi/2 but I'm not sure at all. -
## Calculus

For approximately what values of x can sinx be replaced by x - x^3/6, with an error of magnitude no greater than 8 * 10^-3? -
## calculus

f(x)=3-5x , (-1,8) find the slope of the tangent line to the graph of the function at the given point -
## Pre-calc Math

The path of a satellite orbiting the earth causes the satellite to pass directly over two tracking stations A and B, which are 95 mi apart. When the satellite is on one side of the two stations, the angles of elevation at A and B are measured to be 87.0° -
## Pre-Algebra

The treasurer of the student body at a college reported that the receipts from a recent contact totaled $916; Furthermore, he announced that 560 people had attended the concert. Students were charged $1.25 each for admission to the concert, and adults were -
## Pre calc

A small plane takes off from island A and flies in a straight line for 12 kilometers. At the same time, a sailor sitting in a sailboat who is 5 miles from the island measures the angled by from island A to the sailboat and the plane is 37 degrees. How far -
## Pre Algebra

Complete the table (Was in a table form!) Scientific Notion /// Standard Notion 1. ________________ = 62,000,000 2. -3.05*10^6 = ___________ 3. ________________ = .00000089 Simplify 4. (9.8*10^2) * (5*9*10^7) 5. (7.2*10^-5) / (4.3*10-3) My Answers:- 1. -
## Pre calc

Write the equation in standard ellipse form and graph. 34 x^2 -24xy +41y^2 +41 y^2 -25= 0. i got x= (4 x prime- 3 y prime)/5 and y=(3x prime +4y prime)/5 but cant get the correct math when I plug that into the original equation. Also I need help finding -
## Pre-Calc College

Two 5-grain aspirin tablets contain 650 mg of the drug. With aspirins half-life of 29 minutes, how much is left in the bloodstream after 2 hours? How long does it take for the level to be equivalent to 10 mg of aspirin? If an individual takes two tablets -
## pre algebra answer check

You are standing 400 feet from the base of the Space Needle in Seattle, Washington. Using a laser range finder, you measure the distance to the top of the Space Needle to be 725 feet. Find the height of the Space Needle to the nearest foot. I got 629 ft. -
## pre-calc

A ball is dropped from the top of a 25-m ladder. In each bounce, the ball reaches a vertical height that is 3/5 the previous vertical height.Determine the total vertical distance traveled by the ball when it contacts the ground for the sixth time. Express -
## Pre-Cal

This exercise is based on the following table, which lists interest rates on long-term investments (based on 10-year government bonds) in several countries in 2008. How long, to the nearest year, will it take an investment in Germany(4.3%) to triple its -
## Pre-calc

A truck is traveling at 70mph and has wheels with a diameter of 26in. Find the angular velocity in radians per minute. Also find in revolutions per minute. I've attempted this question and am completely stumped. I can't figure out how to make it work with -
## Math Analysis (Pre Calc)

A pilot wants to fly 430 miles per hour at 45 degrees north of east, but there is a westerly wind blowing 20 miles per hour. What course correction does the pilot have to make to fly on his desired landing? I wasn't able to figure out any work for this -
## Pre-Calc

An airplane’s velocity with respect to the air is 630 mph, and its heading is 𝑁 30° 𝐸. The wind, at the altitude of the plane, is directly from the southeast at 45° and has a velocity of 45 mph. Draw a figure that gives a visual -
## Pre Algebra

Suppose you have an after school baby sitting service. You charge a flat fee of $10 per week plus $3 per hour. The equation y = 3x + 10 represents your earnings per week for one child. Describe the y intercept. Answer: The y intercept is (0,10) but I'm -
## Math(Pre-algebra)

Ok, my question is ‘ last year the price of a certian computer was 150$ more than it is now. This year's price is 3/4 of last year's price. How much does the computer cost this year?‘. Can someone explain to me how to create an equation for this? -
## Pre-Algebra

The Jaspers collect nickels, dimes, and quarters in a jar. When they count the change in the jar, there are twice as many nickels as there are quarters. If there is $15.30 in dimes and $74.80 in all, how many quarters are there. Please include an equation -
## Pre-Alegebra

You spin a spinner that is divided into 6 equals parts once and roll the number cube once. Find the probability that the spinner stops on the same number that you roll the number cube? -
## Pre Algebra Review

Thirty-five students belong to the science club. This 1/4 the number in the 5 sections of the eighth grade. How many students are in the eight grade? How many in each section if each section has the same number of students? -
## pre-cal

The angle of elevation from a car to the top of an apartment building is 48 degrees. If the angle from another car that is 22 feet directly in front of the first car is 64 degrees. How tall is the building? -
## pRE calc

A Determine the location of the turning pints for the cubic y= x^3 - 3x^2 +2x+10 B) Use the fact that a cubic is symmetric about its point of inflection to determine the location of the pint of inflection of the cubic in part (a) -
## Pre-Cal(Please check)

Approximate the equation's solutions in the interval (0,2pi) sin2x sinx = cosx 2cos(x) (1/2-sin^2x) = 0 Then I got 3pi/2, pi/2, pi/6 and 5pi/6 Then I substituted 0-3 and got 3pi/2 , 5pi/2 , 9pi/2 , pi/2, pi/6, 7pi/6, 13pi/6 , 19pi/6 , 5pi/6 , 11pi/6 , -
## Pre Cal.

Evaluate tan(cos^(-1)(ã3/2 )+tan^(-1)(ã3/3))? arccos(sqrt(3) / 2) = pi / 6 arctan(sqrt(3) / 3) = pi / 6 tan(pi / 6 + pi / 6) = tan(pi / 3) = sqrt(3). -
## Math (Pre-Calc)

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 ∠A1 is smaller than ∠A2.) b = 74, c -
## Pre-Algebra

Scatter plots are used to look for a pattern of association, or trend, between one set of values two sets of values three sets of values four sets of values My answer: two sets of values -
## pre algebra

the midpoints of each side of triangle NOT are connected to make a smaller triangle inside triangle NOT. If the area of triangle NOT is 16 in squared, what is the area of the smaller triangle? -
## pre algebra

the equation d=1.2 radical h , gives the distance ,d, in miles a person can see to the horizen from a hieght ,h, in feet.( hint: 1 mile =5,280 ft. A) solve the eqaution for h . B)longs peak in the longs national parkis 14,255 feet in elevation . How far -
## pre-cal: graphs of functions- fill in the blank

To find the domain of a function from its graph... To find the range of a function from its graph... To approximate the relative minimum or maximum of a function using a graphing utility,... Let a(,f(a)) and (b,f(b)) be two points on the graph of a -
## Pre-algebra

I don't understand this. Can you do some examples? One student had the following way of dividing fractions. First the student renamed the two fractions with a common denominator. Then the student ignored the denominators and just divided the numerators to -
## Psychology

Could someone see if I got any of the questions wrong. I feel that some questions have multiple answers but there is only one that is correct. Please help. thanks a lot State whether each scenario is an example of assimilation or accommodation. 1. A child -
## Pre-Cal

Use an Addition or Subtraction Formula to write the expression as a trigonometric function of one number. (tan(74°)-tan(14°))/(1+tan(74°)tan(14°)) =__________ Find it's exact value (not decimal form) =__________ Note: A similar question(but with -
## Pre-calc

Use the given information to determine the values of sinθ, cosθ, and tanθ. tan2θ=7/11 ; π<2θ<3π/2 Please show work +answer. Thank you, tutor. -
## pre algebra

If the sum of an integer and a greater integer is 19.What is the greater integer? 9+10=19 -
## pre algebra

A college bookstore ordered 6 boxes of red pens. The store sold 32 red pens last week and 35 red pens this week. Five pens were left on the shelf. How many pens were in the box? How would you solve it and check answer into the original problem? -
## Pre-Calc (Circles). Please help :(

Five concentric circles with radii 1, 2, 3, 4, and 5 are drawn as shown dividing the circle of radius 5 into five regions: a circle of radius 1 and 4 annuuli (rings). What is the probability that a point chosen randomly from within the circle of radius 5 -
## 7th grade math pre algebra

I'm confused about this math question my teacher gave us today. Bowser's dog food is 40% meat. How much dog food would Bowser eat in order to get 11 kgs of meat? -
## math

Stacey used her 20% discount card to buy 7 cans of tomatoes and 15 cans of mushrooms for $10.64. The next day Brian spent $ 7.21 on 17 cans of tomatoes and 5 cans of mushrooms in a "30% off" sale. Find the undiscounted pre- sale price of each type of can. -
## Pre-Ap Physics

To win the game, a place kicker must kick a football from a point 17 m (18.5912 yd) from the goal, and the ball must clear the crossbar, which is 3.05 m high. When kicked, the ball leaves the ground with a speed of 15 m/s at an angle of 58.9◦ from -
## Pre-Ap Physics

To win the game, a place kicker must kick a football from a point 17 m (18.5912 yd) from the goal, and the ball must clear the crossbar, which is 3.05 m high. When kicked, the ball leaves the ground with a speed of 15 m/s at an angle of 58.9 ◦ from -
## Pre-Ap Physics

To win the game, a place kicker must kick a football from a point 17 m (18.5912 yd) from the goal, and the ball must clear the crossbar, which is 3.05 m high. When kicked, the ball leaves the ground with a speed of 15 m/s at an angle of 58.9 ◦ from -
## Math (pre Algebra)

The perimeter of a rectangle picture frame is 30 inches. The length of the frame is three less than twice the width. What are the dimensions of the frame? I know that the perimeter is 30 in., the length is 2w-3, and the width is w, but I don't know what to -
## Pre-Calc

I need to figure out how to solve the equation x-squared y-squared+xy=1 i have no clue. I would appreciate any help! did you mean (x^2)(y^2) + xy = 1 ??? If so, are you solving for x or y? Suggestion: let xy = a, then you have the equation a^2 + a - 1 = 0 -
## PRE-CALC

I am given the rational function: f(x)= (x^3 - 1) / (x^2 - 4) I found that the domain is all real numbers except x= plus or minus 2 , I also found that the x intercept is x=1, however I do not get how to find: the y-intercet , or identify the Horizontal, -
## pre-calc

The probability, P, in percent, that a person will respond to a certain ad can be modelled by the equation P(n)=1-2^(-0.05n), where n is the number of days since the ad began on tv. After how many days is the probability greater than 20%? my work: -
## Pre Calc

If the line passing through the points (a, 1) and (2, 8) is parallel to the line passing through the points (12, 6) and (a + 2, 1), what is the value of a? -
## Pre-algebra

A pole that is 3.1m tall casts a shadow that is 1.64m long. At the same time, a nearby building casts a shadow that is 50.25m long. How tall is the building? Round your answer to the nearest meter. -
## Pre-Calc

Hi, Find the exact value of the following expression: Sin^-1(1/radical2) (Its inverse sin(1/radical2) Direction -(Type your answers in interval notation. Type an exact answer using pi as need) Please show how you got the answers so I can use this as a -
## Pre Calc

Dr. Black is standing 15 feet away from the street lamp. The lamp is making his shadow 8 feet long. The angle of elevation from the tip of the shadow to the tip of the streetlamp is 50 degrees. How tall is the streetlamp? -
## Pre-algebra

Jeremy is playing a game called “Rational Round Up” where he has to collect all the numbers in a maze that are rational and then get to the end of the maze. When he collects a number he must prove it is rational by writing it as a quotient of two -
## Physics Pre-Ap

014 (part 1 of 2) You drop a stone from a position of rest. How far will it fall vertically in the ﬁrst 2 s? The acceleration of gravity is 9.8 m/s 2 . Answer in units of m 015 (part 2 of 2) If you instead toss it horizontally at 2.7 m/s, how far -
## pre calc

in many parts of the coutry the average temp of a particular area may be modeled by a sin usoidal function. According to NCDC the average temp of k city is 92.2 in july and 32.2 in january assume that the period is 12 what is the best model for when july -
## Health Care Fnancial Accounting

the local school system asks to submit a proposal to do pre-employment physicalsfor 60 bus drivers. What financial or accounting informaton is needed to submit the proposal? what shall I charge the school system? -
## Math Pre-Algebra

Maria has baked a cake for Cathy's birthday. The dimensions of the cake are 13/1/2 inches by 6/3/4 inches. The cake is going to be cut into squares with each piece being approximately 5.55% of the cake, which should give a total of _______ pieces of cake -
## Pre-Cal

An airplane's velocity with respect to the air is 580 miles per hour, and it is heading N 60 degrees W. The wind, at the altitude of the plane, is from the southwest and has a velocity of 60 miles per hour. What is the true direction of the plane, and what -
## pre-calc

A hardware store makes a profit of $41,000 during its first year. The store owner sets a goal of increasing profits by $9000 each year for 4 years. Assuming that this goal is met, find the total profit during the first 5 years of business. -
## Pre-Calculas 11

a farmer wants to build two pens (one for cows, the other for horses) on land by a straight road. There is already a fence along the road and the farmer has 800m of fencing to build his fence to enclose the pens and separate them as shown in the diagram -
## Pre-Calc College

Two 5-grain aspirin tablets contain 650 mg of the drug. With aspirin's half-life of 29 minutes, how much is left in the bloodstream after 2 hours? How long does it take for the level to be equivalent to 10 mg of aspirin? If an individual takes two tablets -
## Pre calc

A local salesman receives a base salary of $575 monthly. If his total sales receipts for the month exceed $1800, he also receives a commission of 11% on the portion of sales over $1800. How much would he have to sell in a month if he wants to have a -
## pre algebra

Ellen buys 6 more paperbacks than hard covers. Paperbacks cost $8 each and hard covers cost $15 each. If Ellen spends a total of $117 on the books, how many of each type does she buy? Give a complete algebraic solution, using the distributive property. -
## waste water treatment

QF Description Wastewater from a small town is treated in a trickling filter which is preceeded by a screen, sand-removal and primary clarification. The maximum hydraulic capacity, or peak flow, of the treatment plant is 1,500 m3/h. The dry weather flow -
## Pre-Cal

Find all the soultions of the equation in the interval (0,2pi) sin 2x = -sqrt3 /2 sin -sqrt3 /2 is 4pi/3 and 5pi/3 in the unit circle 2x= 4pi/3 + 2npi 2x=5pi/3 + 2npi I do not know what to do at this point. -
## Pre calc

Given that tanθ = 2 root 10 over 9 and cscθ < 0 , find the exact value of cos(θ − pie over 4) . I solved for the other side and got 11. After this idk what to do I was thinking using cos(a-b)=cos(a)cos(b)-sin(a)sin(b) but idk how to witht the pie/4 -
## Pre-Cal (Please help)

Find all the soultions of the equation in the interval (0,2pi) sin 2x = -sqrt3 /2 sin -sqrt3 /2 is 4pi/3 and 5pi/3 in the unit circle 2x= 4pi/3 + 2npi 2x=5pi/3 + 2npi I do not know what to do at this point -
## Pre Cal

find the surface area of a box of hieght h whose base dimensions are p and q, and that satisfies either one of the following conditions: a) the box is closed. b) the box has an open top. c) the box has an open top and a square base. -
## Pre-Calc

The peak of a mountain is observed from the base and from the top of a tower 180 ft high. Find the height of the mountain above the base of the tower is the angles of elevation of the peak are 21 degree 35’ and 24 degree 48’ -
## pre algebra

A flower bed is in the shape of a triangle with one side twice the length of the shortest side, and the third side is 30 feet more than the length of the shortest side. Find the dimensions if the perimeter is 138 feet -
## Pre-Calc.

Alice walks on a straight line at four miles per hour. Two hours after she begins walking, Bob runs after her at a rate of six miles per hour. How many hours does it take for Bob to catch up to Alice? -
## pre-algebra

Write the equation of this situation: the value,v, in hundreds of dollars of Debbie's coin collection is 10 dollars more than 1/2 of the age, t (in years). Then determine the value of Debbie's coin collection of it is 8 years old. Please show all of your -
## Pre- Algebra

Linda entered an elevator on floor 9. She rode down 8 floors then she rode up 11 floors and got off. What floor was she on when she left the elevator? -
## pre-algebra

Which is the better buy: Brand A with a regular price of $15.98and a 30% discount or Brand B with a regular price of $18.50and a 40% discount -thanks -
## pre-algebra

Which is the better buy: Brand A with a regular price of $15.98and a 30% discount or Brand B with a regular price of $18.50and a 40% discount -thanks -
## Pre-Algebra

To make a batch of cookies you need 3.25 cups of sugar, if you start off with 16.5 cups of sugar, how many batches of cookies can you make? -
## calculus

Use iterated integral to find the area enclosed by r=2sin2(theta). How do i graph this? -
## Calculus

Evaluate the following limit: lim x->0 xcscx =limx->0 x/sinx Does it equal one because the reciprocal is 1/1=1? -
## Calculus AP need help!

its difficulty problem. find dy/dx by implicit differentiation 1.4 cos x sin y = 1 2.tan(x/y)= x+y -
## Calculus

The end behavior of f(x)=(2+x^2)/(x^2-36) most closely matches which of the following: y=1 y=-18 y=2 y=0 I still don't get this based on steve's answer will someone please help? -
## Calculus

Using polar coordinates, evaluate the integral which gives the area which lies in the first quadrant between the circles x^2+y^2=64 and x^2 - 8x + y^2 = 0. -
## calculus help

y=cosxcosy-sinxsiny/sinxcosy+cosxsiny find dy/dx plz show me working -
## 12th grade calculus

find the lines that are (a) tangent and (b) normal to the curve at the given point x^2 + xy - y^2 = 1 -
## Calculus-Derivatives

How is 6#sin(#x-1)/cos^3(#x-1) the derivative of f(x)= 3sec^2(#x-1)? #= Pi (I coulnd't find the symbol...sorry.) -
## Calculus

Find the derivative of the given function w=((t^3)+8)^103 Isnt the answer 309t((t^3)+8)^102 -
## Calculus

Find the particular solution of the differential equation y'=(5x+21y)/7x satisfying the initial condition y(1)=5. -
## Calculus

Piecewise function x if −2≤x≤0; x^2 if −2<x<0; 8-x. If if −2≤x≤3; (d) Write down an analytic formula for f^{-1}, and state its domain and range. -
## calculus

f(x)=8/(x^2+x+2) Set up an equation, which when solved will give the points where the tangent line has y-intercept 5. -
## calculus

If the graph of f passes through the point (1, 0) and the slope of the tangent line at(x, f(x)) is 4x − 3, find the value of f(2). -
## Calculus

Please help!! I keep solving this problem but I keep getting the wrong answer. Find the derivative of the function: f(x)= xsqrt(x-1)/(x+2) -
## Calculus Grade 12 University

8. Find the vector equation of the line in which the 2 planes 2x - 5y + 3z = 12 and 3x + 4y - 3z = 6 meet. -
## Calculus

Use the Law of sines to find the remaining sides. 1. a=40 degrees; Beta=87; c=115 -
## calculus

find the area of a rectangle bounded by the axes and one of its corner is a point in a curve y=1/x. -
## CAlculus

Find the linear function satisfying the given conditions. g(2) = 9 and the graph of g is perpendicular to the line 4x − 2y = 3. g(x) = -
## Calculus

Use Simpson's Rule with n = 10 to estimate the arc length of the curve. y = tan x, 0 < x < π/9 -
## Calculus

If f(x) = (e^(x))sin(x) what is the 1000th derivative? Step are needed and the general rule/pattern -
## Calculus

Find the volume of the cone of maximum value that can be inscribed in a sphere of radius 10cm. -
## Calculus

For which values of x does the curve Y= (3x^3-3x^2+1) / (2x^2-1) , have a horizontal tangent? Show steps or explain, i dont get it -
## Calculus

If the instantaneous rate of change of f(x) at (2,-4) is 5, write the equation of the line tangent to the graph of f(x) at x=2.