# Pre- Calculus

21,880 results, page 97

1. ### 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 nonlinear function f. The ...
2. ### 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 has always used a ...
3. ### 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 different degrees) had the ...
4. ### 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.
5. ### pre algebra

If the sum of an integer and a greater integer is 19.What is the greater integer? 9+10=19
6. ### 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?

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 lies in the annulus ...
8. ### 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.
9. ### 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?
10. ### 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 the horizontal. The ...
11. ### 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 the horizontal. The ...
12. ### 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 the horizontal. The ...
13. ### 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 solve it as a ...
14. ### 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 do after that?
15. ### 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: 0.20=1-2^(-0.05n) then i ...
16. ### 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, vertical or slant ...
17. ### 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?
18. ### 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.
19. ### 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?
20. ### 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 reference for others. ...
21. ### 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?
22. ### 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 will it fall vertically...
23. ### 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 integers. Help him ...
24. ### 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 is month 0 and when ...
25. ### 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 with each piece having...
26. ### 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 below. what is the ...
27. ### 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.
28. ### 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 every 4 hours, what ...
29. ### 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 is its speed woth ...
30. ### 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.
31. ### 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 monthly income of \$2200?
32. ### 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 (Qdwf) amounts 7,500 m3...
33. ### 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?
34. ### 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.

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
36. ### 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.
37. ### 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
38. ### 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’
39. ### 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 work.
40. ### 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 someone please help
41. ### 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?
42. ### 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?
43. ### 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
44. ### 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
45. ### pre-calc

Hello, I'm trying to figure out how to do this problem, but don't know where to begin. I think some information is missing. Blood Pressure: The function P=120+30Sin 2pi(t) models the blood pressure (in millimeters of mercury) for a person who has a high blood pressure of 150/...
46. ### Physics (Pre-AP)

I have the same exact question as BAdams did in 2008! I was wondering if anyone could explain this in further detail. A positively charged light metal ball is suspended between two oppositely charged metal plates on an insulating thread as shown below. After being charged once...
47. ### Pre-Ap Physics

During World War I, the Germans had a gun called Big Bertha that was used to shell Paris. The shell had an initial speed of 2.65 km/s at an initial inclination of 41.9◦ to the horizontal. The acceleration of gravity is 9.8 m/s 2 . How far away did the shell hit? Answer ...
48. ### Pre-Algerbra

I don't really understand this and my teacher at school is no help. Can anyone explain what I'm supposed to do here? ----- 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 ...
49. ### calculus

Find the volume of the solid obtained by rotating the region bounded by y=4x^2,x=1,y=0 about the x-axis.
50. ### calculus

find the following derivatives: f(x) = (2x+5)/(x^2-3) f'(x)= (2)*(x^2 -3)-(2x+5)*2x/(x^2-3)^2 is that correct??? f(x)= (lnx)(cos x) f'(x)= 1/x*-sinx or do i have to use the product rule?? thank you.
51. ### Calculus

What would the smallest positive integer be for n if: y=sinx and y^(n) means the nth derivative of y with respect to x.
52. ### AP Calculus AB

If y = (((3x^2)+ 5)^5)((x+2)^4), then dy/dx = ? I've gotten to the point where i have (5((3x^2)+ 5)^4)(4(x+2)^3)(6x), what do i do next? It's a multiple choice question anf this is not one of the answers listed. Any help would be appreciated. Thanks!
53. ### calculus

Find the volume of the solid obtained by rotating the region bounded by y= x^2 and x=y^2 about the x-axis.
54. ### calculus

Consider the function f(x)=12x^5+30x^4–160x^3+5 . f(x) has inflection points at (reading from left to right) x=D , E , and F D= E= F=
55. ### calculus

For each of the following limits, determine the indicated limit if it exists. lim f(x)=? x approaches 4 from the left f(x)= -3.9997
56. ### Calculus - #5

If h(x) is equal to (x^2-4)/(x+2)when x ≠ –2, and h(x) is continuous for all real numbers, then what is the value of h(–2)? 0 –2 –4 2 This is impossible. There is an infinite discontinuity at x = –2.
57. ### Calculus

Find the first four non-zero terms and the general term for the Taylor Series centered at c = 1 for the integral of ln(x).
58. ### math

Use Part 1 of the Fundamental Theorem of Calculus to find the derivative of the function. g(x) = e^(3t^2) − 3t dt from 4 to x
59. ### Calculus

Find the volume of the solid formed by revolving the region bounded by y=x^3, x=2 and y=1 about the y-axis. Please help =(
60. ### calculus

Prove that the sum of the vectors from the vertices to the centre of a regular octogon is a zero vector.
61. ### Calculus

(y/(x+9y))= (x^2)-7 at the point (1, -6/55) Use implicit differentiation to find the slope of the tangent line to the curve
62. ### Calculus

The function f is given by f(x)=3x^2+1. What is the average value of f over the closed interval [1,3]? The answer I get is 12, but the book says it's 14. I don't understand why.
63. ### Calculus

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

in your own words, describe how limits can be used to find the instantaneous rate of change of a function.
65. ### Calculus Help

Use logarithmic differentiation to find the derivative of the function. show steps please! y=(e^-xcos^2(x))/(x^2+x+1)
66. ### Calculus-concavity and graphing

(2x+1)/(8x+1) f is increasing for x: f is decreasing for x: find local max/min:
67. ### Calculus

Can someone please work this algebra. verify that y(x) = -ln (x - cx^2) satisfies the ODE x(e^y - y') = 2 where c is constant. I have been working through this and it is way too messy.
68. ### calculus

solve the differential equation. assume a, b and k are non zero constants. dR/dt = kR i don't understand how to do these problems.
69. ### Calculus

Find the surface area of the part of the sphere x2+y2+z2=81 that lies above the cone z=√(x2+y2)
70. ### Calculus Help and Check

Find dy/dx by implicit differentiation. x^5(x + y) = y^2(9x − y) this is what i've got so far but I don't think it is the right answer. y'= 9y^2-6x^5-5x^3y/x^5+9y^2-18xy
71. ### Calculus

y=sqrt(x)^1/x. Find dy/dx That is to the power of 1/x So to start this do I need to take Ln on both sides and then use a logarithm property? Ln(y)=lnx^1/2x?
72. ### calculus

find a point on the curve x^3 + y^3 =2xy other than the origin at which tangent line is horizontal
73. ### calculus

find 3 positive real numbers whose sum is 500 and whose product is as large as possible.
74. ### Calculus

Find the length of the intercepted arc with radius 2.5 cm and a central angle of 95 degrees
75. ### Calculus

find all values of x for which function is differentiable. y=lnx^2 why is the answer= for all x doesn't equal 0?
76. ### Calculus

How would I find the Integral of 3dx/(10x^2-20x+20) I've been stuck on this, and would like an answer ASAP.
77. ### calculus

Find a point c satisfying the conclusion of the Mean Value Theorem for the following function and interval. f(x)=x^−1 [1,9]
78. ### calculus

In the space below, provide the smaller of the two positive integers that add to 40 and have the largest possible product
79. ### calculus

Find the volume of the solid obtained by rotating the region bounded by y= x^3 and x= y^3 about the line x= -1.
80. ### calculus

Evaluate the integral. (Remember to use absolute values where appropriate. Use C for the constant of integration.) (11)/(x^3-125) dx
81. ### calculus

determine whether the series converges of diverges the sum from k=1 to infinity of sin(e^-k) I'm not sure where to start..
82. ### calculus

Find the volume of the solid obtained by rotating the region bounded by y=5x+25 and y=0 about the y-axis.

84. ### calculus

Find the volume of the solid obtained by rotating the region bounded by y=5x+25 y=0 about the y-axis.
85. ### calculus

the area of the first quadrant bounded by the y-axis, the line y=4-x, and the graph of y=x-cosx is approximately
86. ### calculus

Find the volume of the solid formed by rotating the region enclosed by y=e^(2x)+1 y=0 x=0 x=0.9 about the y-axis.
87. ### calculus

the area of the first quadrant bounded by the y-axis, the line y=4-x, and the graph of y=x-cosx is approximately
88. ### Calculus

Solve the following initial valued problems: a) g′(x) = sin(x), g(π) = 2. b) g′′(x) = 18x, g′(0) = 1 and g(0) = 5. b) g′′(x)=12x2 +2,g′(1)=7andg(1)=3.
89. ### Calculus

Find the x-coordinates of all points on the graph of y = x^3 - 4x^2 + 5x at which the tangent line is parallel to 2y - 10x - 7 = 0
90. ### calculus

Find the smallest possible area of an isosceles triangle that is circumscribed about a circle of radius r
91. ### calculus PLZ HELP!!

find the equation for the line tangent to the curve at the given point. (x^2)(y^2)-2xy+x=1 at (2, 1/2)
92. ### calculus

determine whether the series converges of diverges the sum from n=1 to infinity of sin(e^-k) I'm not sure where to start..

94. ### Calculus

Use a triple integral to find the volume of the solid enclosed by the paraboloid x=8y^2+8z^2 and the plane x=8.
95. ### calculus

Find the derivative of (3x+17)^13 (14x+6)^11x^-4/5 / (20x +3)^-9 using logarithmic differentiation. Assume x > 0.
96. ### calculus

Use polar coordinates to find the volume of the given solid. Inside the sphere x^2+y^2+z^2=25 and outside the cylinder x^2+y^2=1