03/10/15
Math assistance.
If you were to sketch a circle graph for the data shown in the table below, approximately what fraction of the circle would represent food? Activities $600; Food $450; Souvenirs $270.
03/10/15
word problem
The Johnsons want to cover their backyard with new grass. Their backyard is rectangular, with a length of 3x – 5 feet and a width of 4x – 10 feet. However, their rectangular swimming pool, along...
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Which of the following represents the graph of f(x) = 3x ?
Choose one answer.
A. graph begins in the second quadrant near the x axis and increases slowly while crossing the ordered pair 0, 1. The graph then begins to increase quickly throughout the first...
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03/10/15
Simplify the trigonometric expression
cotxsinx-sin((π/2)-x) +cosx
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03/10/15
what is the equation format for solving percent problems
this question is troubling me. I really need the answer to this question because I need it for a test please help
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03/10/15
Geometric progression
The second term of a convergent geometric series is 24 and the sum of the first three terms is 126. Find the common ratio of the series.
03/09/15
Fuel Efficiency
A family has two cars. The first car has a fuel efficiency of 15 miles per gallon of gas and the second has a fuel efficiency of 35 miles per gallon of gas. During one particular week, the two cars...
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Exponential and logarithmic functions
Carbon Dating The age of an ancient artifact can be determined by the amount of radioactive carbon-14 remaining in it. If D0 is the original amount of carbon-14 and D is the amount remaining, then...
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03/09/15
Please help -word problem
One computer can solve a certain problem in 30 min. With the aid of a second computer the problem is solved in 10 min. How long would it take for the second
computer to solve the problem alone?
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03/08/15
find an equation in STANDARD FORM of the tangent line to the function at the given point
1) y=1-x-x^2-x^3-x^4 at x=-2
2) y=2x(3x+2)^2 at x=-1
3) y=(3x^4-6x^2+10)/ (12-2x^2-3x^3) at x=-1
This is what i got but i wasn't positive:
1) -23x+y=37
2)...
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03/08/15
verify that: cos^3(x)+sin^3(x)=1/2* (cos(x)+sin(x))*(2-sin(2x))
verify that: cos^3(x)+sin^3(x)=1/2* (cos(x)+sin(x))*(2-sin(2x))
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03/08/15
Find the value of two numbers if their sum is 33 and their difference is 5.
Find the value of two numbers if their sum is 33 and their difference is 5.
03/08/15
Word problem
A plane has a cruising speed of 100 miles per hour when there is no wind. At this speed, the plane flew600 miles with the wind in the same amount of time it flew 400 miles against the wind. Find...
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Find the volume of the solid
Using disks or washers, find the volume of the solid obtained by rotating the region bounded by the curves y=sec(x), y=1, x=-1, and x=1 about the x-axis
03/07/15
Find the volume of the solid
Using disks or washers, find the volume of the solid obtained by rotating the region bounded by the curves y=1/x, y=0, x=1 and x=4 about the x-axis
03/06/15
Bike Shop question
The Bike Shop sells bicycles and tricycles and often has a selection of them sitting outside for customers to try. Big Bird counted 101 wheels and 42 handlebars of all the bicycles and tricycles....
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03/06/15
a square garden is 10 feet long and needs to be surrounded by a walkway that is 2 feet wide on only three of its sides. What is the area of the walkway?
draw a diagram to help you
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03/06/15
A company buys a machine for $20 million. Four years later, the machine is worth $12 million.
A company buys a machine for $20 million. Four years later, the machine is worth $12 million. Assume the decline in value follows the exponential model y=y0e^kt. Find the exponential model. Use the...
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03/06/15
FUNTIONS f(t) = 2w^3-33w^2+180w+11
The function f(t) = 2w^3-33w^2+180w+11 has one local minimum and one local max.
This function has a local minimum at x = ? with the value ?
and a local maximum at x equals ? with value ?
03/05/15
Fraction Word Problem. Wasn't covered in lecture or book.
I bought a length of rope at Lowe's. I used a third for something. I then used a fourth of the remaining length of rope for something. I'm left with 6 ft. What was the original length?
I'm also...
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03/05/15
discrete math. sets problem. true or false?
let T = {(x,y) ∈ R x R(real numbers) | y = √x / (√(x-3)) Let D = {y ∈ R, | (x,y) ∈ T for x ∈ R}. for each one, decide if true or false a) 1/4 ∈ D b) 4 ∈ D why?
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03/05/15
Find the values of x where f has a local max and min
f(x)= ln(2x+4)+x^2
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03/04/15
algebra advanced word problem
Tito Sanchez receives a weekly salary of $400 at Anderson Appliances. He also receives a 6% commission on the total dollar amount of all sales he makes. What must his total sales be in a week if he...
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Maximum volume
From a thin rectangular piece of cardboard 8 inches on a side, small squares are cut out of the corners. The sides are then folded up to form a box. What size squares should be cut out to maximize...
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