07/28/16

Word problesm including Half-life
A superhero is rendered powerless when exposed to 55 or more grams of a certain element. A 350 year old rock that originally contained 650 grams of this element was recently stolen from a rock... more
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07/28/16

A person uses a 512 Hz tuning fork to find the first two resonant lengths of a closed air column in a very warm classroom. The first length measured was 17.1 cm
A person uses a 512 Hz tuning fork to find the first two resonant lengths of a closed air column in a very warm classroom. The first length measured was 17.1 cm and the second resonant length was... more
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07/27/16

How many coins were there before they were shifted? (Plz read the question below. It has more info.) (URGENT!!!)
There is a total of 150 coins in two boxes. Seventeen coins are then shifted from the first box to the second, resulting in the second box having twice the number of coins as the first. The number... more
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07/27/16

Subtract the two complex numbers 41+71i-61+27i
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07/26/16

Intermediate algebra help
The number of grams of radioactive cesium that remain after t years from an original sample of 30 g is given by N(t) = 30(2–0.0322t). Using a graphing calculator, graph N and determine in how may... more
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07/26/16

Suppose u=5,0 and v=5,0 . Then: u+v = u-v = v-u = 6u = -21v = 2u-7v =

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07/26/16

Consider the vector v?? between (0.7,2) and (-0.3,1.9). The vector v?? is . The length of v?? is . If the tail of v?? is at (-4.6,2.8), then the tip is at .
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07/26/16

Solve for x by factoring
Solve for x by factoring where 0≤x≤2∏   √3 sinx tanx=3 sinx
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07/25/16

find the concentration of hydrogen ions in each cleaner and use it to compare the hydrogen concentrations of the two cleaners
The pH of formula 409 glass and surface cleaner is 9.5, while the pH of Fantastik is 10.0 find the concentration of hydrogen ions in each cleaner and use it to compare the hydrogen concentrations... more
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07/24/16

Position Vectors and Coordinate Geometry
A space shuttle is moving in a straight line and is traveling at a constant speed. It takes 3 hours to get from A to B and 1 hour to get from B to C. Relative to a suitable set of axes, A is the... more
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07/23/16

Measuring Volume
At a car repair gagage a 60litre drum of oil was used to fill 15 1 litre containers and twenty four 500ml containers. How much oil was left in the drum?
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07/22/16

I have a question about performing rotation in the topic geometry, How can you find the coordinates when X,Y, is rotated counterclockwise 90 degrees
How can you find the coordinates when x,y is rotated counterclockwise 90 degrees. I looked up all the steps too performing rotation but still don't get it.
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07/21/16

polynomials
The polynomial of degree 4, P(x) has a root of multiplicity 2 at x=1 and roots of multiplicity 1 at x=0 and x=−2. It goes through the point (5,56).Find a formula for P(x).
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07/21/16

Algebra word problems
When you swim with the current, you can swim 20 miles in two hours. However, when you swim against the current it takes you four hours. How fast is the current running and how fast could you swim... more
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07/21/16

LINEAR OR NOT?
Determine whether the following function is linear   y = 3/x   Explain why
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07/21/16

Linear Or Not?!
Determine whether the following function is linear   y = 3^x + 5   Explain why
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07/21/16

Find formula for P(x)
The polynomial of degree 4, P(x) has a root of multiplicity 2 at x=1 and roots of multiplicity 1 at x=0 and x=−3. It goes through the point (5,128).Find a formula for P(x).P(x)=
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07/21/16

What is the value of y when x=9?
The value of y is inversely proportional to the value of x. When y=42, x=6. What is the value of y when x=9? 
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07/21/16

if sin theta is 1/5 and theta is in the interval [pi/2,pi] then find the value of tan theta
 I believe that this is using soh cah toa but I may be wrong and am confused about the interval part.
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07/20/16

Find the hydronium ion [H3O^+] concentration for the substance with the given pH.
The formula for the pH of a solution of hydronium ions given by the logarithmic equation pH=-log[H3O^+], where [H30^+] is the hydronium ion concentration. Find the hydronium ion [H3O^+]... more
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07/20/16

How do I answer this word math problem
The nutrition information on the cereal box says that a 1/2 cup serving provides 120 calories and 6 grams of dietary fiber. At that rate, find how many calories and grams of fiber are in a 2/3 cup... more
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07/20/16

A wire is bet in the form of semi circular ring of radius 0.9m and current 1amp and magnetic induction is n×10^-7tesla find value of n?
I need the answer immediately pls urgent
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07/20/16

Confused on this, I thought I find the vertex for max? and not sure how to figure out the second part
A person standing close to the edge on top of a 64-foot building throws a ball vertically upward. The quadratic function h(t)=−16t2+48t+64 models the ball's height about the ground, h(t), in feet,... more
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07/19/16

F(x) is a linear function with f(2)=5 and f(4)=9. How do I solve f(10)?
F(x) is a linear function with f(2)=5 and f(4)=9. How do I solve f(10)?
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07/19/16

The height of an object thrown upward from the surface of a planet is given by the function s(t) = -2t2 + 28t, where t is the time in seconds and s(t) is the he
i do not understand how to do this problem. it is pre calculus
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