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cos t = 2 tan t |
2008-02-06 |
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From peggy:
cos t = 2 tan t. Find the value of sin t.
I can not solve this problem. I have the answer and some hints, but I need a step by step answer.
I really want to understand how this problem is solved.
Answered by Stephen La Rocque. |
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How tall is the pole? |
2008-02-06 |
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From GENEVAMILTON:
A WIRE THAT IS 6 FEET LONG IS ATTACHED TO A THE TOP OF A POLE THE WIRE IS ANCHORED IN THE GROUND AT 4 FEET FROM THE BASE OF THE POLE HOW TALL IS THE POLE?
Answered by Stephen La Rocque. |
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Four digit numbers containing 85 |
2008-02-06 |
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From Vonda:
How many four digit numbers contain the digit pattern 85 at least once and only once?
Answered by Stephen La Rocque. |
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Bales of hay |
2008-02-06 |
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From mark:
5 bales of hay are weighed 2 at a time in all possible ways. The weights are
110
112
113
114
115
116
117
118
120
121
How much does each bale weigh
Answered by Stephen La Rocque and Penny Nom. |
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The cost before tax and shipping |
2008-02-06 |
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From jonathan:
Please explain how to solve this problem. I know you have to work backwards. If i have $125 to spend, how do I know the most I can spend before adding 6% tax and 9% shipping.(shipping is cost before tax) I can only figure this out by trial and error. I know there is a better way
Answered by Penny Nom. |
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A pre-employment evaluation |
2008-02-06 |
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From lisa:
An employer gives a pre-employment evaluation to a large group of applicants.
The scores are normally distributed with a mean of 154 and a standard
deviation of 21. The employer wants to interview only those applicants
who score in the top 15%. What should the cut off score be for the interviews?
Answered by Harley Weston. |
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A positive integer with 2007 digits |
2008-02-06 |
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From Tom:
Prove that there's a unique positive integer of 2007 digits lenght, divisible by 2^2007, and made up solely by the digits 2 and 5.
Answered by Penny Nom. |
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The game of 24 |
2008-02-06 |
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From Jameeka:
What is a solution for 10,11,9 and 2 (Using fractions) in the game 24 square.
Answered by Penny Nom. |
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The domain and range of a function |
2008-02-05 |
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From Victoria:
Please...Please...Please tell me how to find domain and range.
Every text and website i have gone to does not make any sense to me!
Below are two example problems i found on a website...
f(x) = (8x-3)/(4x-1)
and
y = 2x+1
Please explain step by step how to find the domain and range.
Answered by Penny Nom. |
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The equation of a circle |
2008-02-05 |
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From aime:
Find the equation of the circle tangent to 3x+4y-15=0 at P1(1,3) and passing through P2(6,3) and P3(0,5)?
Answered by Stephen La Rocque. |
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Multiplying decimal numbers |
2008-02-05 |
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From alwyn:
Why should when you Multiplying Decimal numbers is value becoming less and less? don't you think even decimal number is a quantity and in no chance when it multiplies its should become less or nil !!!
In fact all Multiplying and or adding the value will go up and only when you subtract and divide it should become less !!
Answered by Stephen La Rocque and Penny Nom. |
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How fast does each travel? |
2008-02-05 |
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From kRYSTAL:
May rides her bike the same distance that leah walks. May rides her bike 10km/h faster than leah walks.
Its takes May 1 hour and Leah 3 hours to travel the sam distance, how fast does each travel?
Answered by Penny Nom. |
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Cost per square yard |
2008-02-05 |
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From Terry:
MY cost for seed is $325.00 per acre...i want to bring that down to $ per sqyard. Whats the formula?
Answered by Penny Nom. |
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Two spinners |
2008-02-05 |
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From Kim:
Zack has two spinners with numbers on them. the probability of spinning
a 7 on both spinners is 3/20. if the probability of spinning a 7 on the first
spinner alone is 1/4 what is the probability of getting a 7 on the second
spinner alone?
Answered by Penny Nom. |
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The radius of a circular arc |
2008-02-04 |
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From Bill:
Hi,the Central Angle of a sector of a circle is 40 degrees. The circular arc of the curve has a chord length of 3000 ft. Find the radius(r) of the circular arc.
Answered by Penny Nom. |
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