05/29/15
Assume that Carbon-14 has a half-life of 5730. If a piece of bone, originally contained 4 grams of Carbon-14, how much of Carbon-14 will it contain after 8500 y
If a piece of bone, originally contained 4 grams of Carbon-14, how much of Carbon-14 will it contain after 8500 years?
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05/28/15
x^2(3x^2+k/x)^8 The constant is 16128. Find k
This is binomial expansion. I need to find k. The constant is 16128. Can you please help me?
x2(3x2+k/x)8. The constant is 16128. Find k
05/28/15
Consider the expansion of (x+3)^10. Find the term containing x^3.
please help. Calculus!
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05/26/15
I need help finding out several things & show work
x| 0| 1| 2| 3| 4| 5|
y| 400| 340| 280| 220| 160| 100
find a rule
find out what y equals when x equals 10
05/26/15
Algebra Word Problem
a grocer has 200 grams of coffe blend that is 1/4 regular and 3/4 decaf. She wants a mixture that will be 75% regular. How many grams of regular coffe should she add
05/26/15
Amount x Rate (%) = Quantity
A dairy needs 232 gallons of milk containing 6% butterfat. How many gallons each of milk containing 7% butterfat and milk containing 3% butterfat must be used to obtain the desired 232 gallons?
05/25/15
from the acceleration function s"(t)=(60/(t+1)^2),
(A) find the acceleration at (t=3sec)?, (B) find the time when the acceleration is (-15ms^-2)?
05/24/15
Word problem!
How much of a 60% orange juice drink must be mixed with 10 gallons of a 30% orange juice drink to obtain a mixture that is 50% orange juice?
05/21/15
"A population of bacteria started at 10,000. If the rate of continuous growth was 5% per hour how long would it take for the bacteria to double?"
I need help with this math question. It is very hard and I don't know how the heck I am suppose to start with this
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05/21/15
What values for theta(0 less than or equal to theta less than or equal to 2pi) satisfy the equation? 2 sin theta cos theta+ (Sqrt of 2)cos theta=0
What values for theta(0 less than or equal to theta less than or equal to 2pi) satisfy the equation? 2 sin theta cos theta+ (Sqrt of 2)cos theta=0
05/20/15
I am lost with this problem help please
There were 420 people who attended a play.The admission price was $3 for adults and $1 for children. The admission receipts totaled $960. How many adults and how manychildren attendedthe play?
05/20/15
math word probelms
twin brother, billy and bobby, can mow their grandparents lawn together in 71 minutes. Billy could now the lawn by himself in 30 minutes less time that it would take bobby. how long would it take...
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05/20/15
can someone solve this problem please?
Nancy and Adriana use a metal alloy that is 16% copper to make jewelry. How many ounces of an 11% alloy must be mixed with a 24% alloy to form 130 ounces of the desired alloy?
05/19/15
Need help with my webassign homework
Find the values of the trigonometric functions of θ from the information given.sec θ = 6, sin θ < 0
05/19/15
Find an equation of the line that passes through (5,7) and is perpendicular to y=5x-4.
The concept of the equation.
05/18/15
A sector has central angle 1.93 rads and radius 5 meters. Find the area
Help me please
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05/18/15
how to find equation of a circle when the diameters of the circle are given?
To know how to find the equation of a circle when the diameters of the circle are given
05/16/15
Proving continuity
F(x)={x^2-3x-10/x-5; x doesn't equal 5
{7; x=5
a) limx->5-
b) limx->5+
c) is the function continuous at x=5
i got 0, 7, and no. I'm both scared to answer the question and...
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05/16/15
Graphing Exponential Functions
y=2x-4
y=2x+4
I'm confused by one being exponents but one isn't. How do I graph these? I try different x values like -1 and -2 but they don't appear similar to the answer in the book.
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05/15/15
system of equations by elimination
an accountant rides a bus part of the way to work everyday and walks the rest of the way. The bus averages 40mph, and the accountant walks a speed of 4mph. The distance from home to work is 27...
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05/15/15
variables with fractional exponents
In Algebra 2, I am given the following problem:
(x3/4 + y-1/2)2
I am told to expand and simplify. How do I solve this?
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05/15/15
using aphone card to make a long distance call costs a flat fee of $0.54 plus $0.14 per minute starting with the first minute.
I started this I don't know if it's okay . I started like this y=0.54+0.14
y=0.54 (4) +0.14, but I got stuck here I cant continue it because it got me confused. I would like to see the steps in...
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05/15/15
system of equations by elimination
it takes a passenger train 5 hrs less time than it takes a freight train to make a trip from Hughesville to Rockville. The passenger train averages 76 km/h, while the freight train averages 38...
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05/15/15
trigonometric identities
Use trigonometric identities to find the exact value of tan(5π/8).
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