03/31/15

What would be the variable in this algebra question
The length of a rectangle is twice the width. Let W be the width, L be the length, and P be the perimeter, all units in inches. A. Which symbol(s) W,L,P are variables? B. Which symbol(s) W,L,P are... more
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03/31/15

4x(x-20)^2 Use a graphing calculator to approximate the values of x that produce a volume of 4500
Note: There are 3 values of x that produce the given value but only two of them are acceptable in the context of the problem. List the two answers, to at least one decimal place, separated by commas.
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03/31/15

Finding angles on clocks
What is the exact angle formed by the hour and minute hand at 4:05?
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03/31/15

Find the exact value of sin(x-(Pi/6)) if cos x=1/4 and x is in quadrent four of the unit circle.
sorry i cant use the correct symbols....
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03/30/15

In a bell-shaped data set with a mean of 50, approximately 68% of the data are between 40 and 60. What is the standard deviation?
 the answer is a whole number 
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03/30/15

The population of the world was 5.7 billion in 1995, and the observed relative growth rate was 2% per year.
By what year will the population have doubled? By what year will the population have tripled?
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03/30/15

Please hurry! help me solve this word problem that involves compounded continuously and doubling
If an account pays 3.5% interest compounded continuously, how long it will take for an investment to double? (Round your answer to the whole number).Hint. You can choose the amount of the investment.
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03/30/15

Write the exponential equation as a logarithmic equation.
Write the exponential equation as a logarithmic equation.13−3.8 = N + 4
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03/30/15

interval [0,2pi) 2 cos 2x - (root2)=0
Please help me find this answer
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03/30/15

An observation deck near the top of Willis towers (formerly known as Sears tower) in Chicago is 1353 ft high. How far can a tourist see to the horizon from this
How far can you see to the horizon from a given height? the function D=1.2√h   can be used to approximate the distance d, in miles, that a person can see to the horizon from a height h, in... more
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03/28/15

An Isotope has a half-life of 15 days. Make a table showing the half-life of this isotope from 32 g to 1 g. List the time (in days,starting with t = 0) in the
...in the first column and the mass remaining in the second column. Which type of sequence is used in the first column and in the second column?   I do not know where to begin on solving this... more
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03/28/15

please help me with this please
two young graduates opened a chain of print shops. The chain expanded rapidly during the early 1990's and many new store were opened . The number of print shops in operation during any year from... more
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03/27/15

True or False: It is not always possible to determine whether or not a solution is extraneous. true false
True or False: It is not always possible to determine whether or not a solution is extraneous. truefalse
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03/26/15

X^3-x^2-81x-81
Please factor.
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03/26/15

How much more time do the additional bottles buy for their civilization? or, similarly, the midnight catastrophe will have now been pushed back to what time?
Once upon a time, at precisely 11:00 pm, a single bacterium was placed into a nutrient-filled bottle in a laboratory. The bacterium immediately began gobbling up nutrients and after just one... more
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03/26/15

At what time was the bottle half full?
Once upon a time, at precisely 11:00 pm, a single bacterium was placed into a nutrient-filled bottle in a laboratory. The bacterium immediately began gobbling up nutrients and after just one... more
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03/26/15

If paulina can ride her bike 25 km in 1 hour, how far can she make it in 6
If paulina can ride her bike 25 km in 1 hour how far can she ride in 6 hours?
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03/26/15

On a reading comprehension test, it would be preferable to achieve a z score of
On a reading comprehension test, it would be preferable to achieve a z score of a) 2.34 b) 3.50 c) 0.00 d) 1.00
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03/25/15

statistics question
For year 2003, the SAT test scores were normally distributed with a mean of 1050 and a standard deviation of 150.What percentage of the SAT scores is above 1050?
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03/25/15

If (x - a)(x - 1) + 1 = (x + b)(x + c) is true for all x and if a, b, and c are integers, find the sum of all possible values of a.
very hard problem you are god if you can solve this
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03/25/15

How many crayons can be made with 7,700 kilograms of wax if each crayon mold holds 5 grams of wax?
Please try to give me an answer with shown work. And if you can explain what i can do to get the answer multiply,add,divide,or subtract.
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03/25/15

What would be the cost after 20 years of an item that costs $600 initially? (Round your answer to the nearest cent.)
From 1929 through the early 1930s, the prices of consumer goods actually decreased. Economists call this phenomenon deflation. The rate of deflation during this period was about 7% per year,... more
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03/25/15

Hello, i need help with finding the sum of a geometric series i would appreciate it very much if you help,
since i am not able to find the ratio i cant find the sum. (5/2^n - 1/3^n) with Sigma that has an index of n=0 and tends to infinity
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03/24/15

Apipe on a swimming pool can be used tofill the pool in 14 hours. The drain pipe can be used to empty the pool in 15 hours...
An inlet pipe on a swimming pool can be used to fill the pool in 14 hours. The drain pipe can be used to empty the pool in 15 hours. If the pool is 2/3 filled already,and both pipes are open,how... more
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03/24/15

Geomorty question on trapezoids
do all trapezoids have all pairs of consecutive angles suplementary?   does an issocles trapezoid have both pairs of oppposite angles congruent?
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