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Factors |
2009-10-30 |
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From brenden:
The numbers 3,5,7 are factors of n. Find four other factors of n besides 1
Answered by Penny Nom. |
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Painting a dome |
2009-10-30 |
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From Jessica:
A hemispherical dome with a radius of 50 ft will be given a coat of paint .01 inch thick.
The Contractor for the job wants to estimate the number of gallons of paint needed.
Use a differential to obtain an estimate (231 cubic inches/gallon) HINT: Approximate the change
in volume of hemisphere corresponding to increase of .01 inch in the radius.
Answered by Robert Dawson. |
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Acreage calculation |
2009-10-29 |
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From Angela:
I am appraising a small portion of property for a right of way for a new sewer line. I have appraised many similar
projects in the past; however the engineer always calculated the exact acreage and/or dimensions of the parcel
being taken. My survey states the following: "141 linear ft. of 25' permanent R/W. I divided the linear feet x 12 and mult. by 25
to get the square footage, but it just doesn't seem right. Any suggestions? Am I missing something?
Answered by Robert Dawson. |
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An irregular quadrilateral |
2009-10-29 |
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From riya:
what is irregular quadrilateral?
Answered by Penny Nom. |
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Is it a rectangle? |
2009-10-29 |
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From sefora:
The coordinates of the vertices of quadrilaterals are given.
Draw each quadrilateral on a grid.
Determine whether it is a rectangle (show your work)
P(5,1), Q(-4,4), R(-6,-2), S(3,-5)
Answered by Penny Nom. |
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A triangle problem |
2009-10-28 |
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From Nazrul:
ABC is a triangle , D is the mid point of AB and DE is parallel to BC where E lies on AC. How can I prove that E is the mid point of AC.
Answered by Penny Nom. |
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An array |
2009-10-28 |
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From felicia:
what factors are shown in the array below?
**
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**
Answered by Penny Nom. |
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Standard deviation |
2009-10-27 |
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From Reggie:
After you have computed the standard deviation of a set of 40 scores, you discover that the lowest score is in error and should be even lower. Will correcting this error affect the standard deviation?
Answered by Penny Nom. |
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Guess and check |
2009-10-27 |
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From Eileen:
Caslin has a total of 50 red beans and green beans. If she trades 1 red bean for 4 green beans, she will have 113 green beans, how may red beans and green beans does she have?
Answered by Penny Nom. |
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Sarim has $1 in coins. |
2009-10-27 |
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From Elizabeth:
Here is the question asked: Sarim has $1 in coins. One-fifth of the coins are dimes, two-fifteenths are nickels, and two-thirds are pennies. Tell how many of each coin he has. I am not sure how to start this problem.
Answered by Penny Nom. |
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How far will it travel in 45 mins? |
2009-10-27 |
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From maison:
I'm stuck on the formula i dont remeber what it is can you help me out
a car is traveling 80km/h how far will it travel in 45 mins
Answered by Robert Dawson. |
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Two non zero vectors |
2009-10-27 |
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From Nazrul:
Given that a and b are two non zero vectors and ma+nb=0 where m and n are two scalars. How can I prove that m=n=0.
Answered by Robert Dawson. |
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Density of dirt and gravel |
2009-10-26 |
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From ken:
if digging a load of dirt and gravel in mining how many yards of material to the ton thanks
Answered by Penny Nom. |
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f(x) = |3x - 6| + 1 |
2009-10-26 |
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From kelsey:
find the coordinates of the vertex f(x)= l3x-6l + 1
Answered by Penny Nom. |
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Graphing y=(4-x^2)^5 |
2009-10-25 |
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From natalie:
I want to graph the curve of y=(4-x^2)^5 without using a graphing calculator. To do this, I'm suppose to find: domain, y and x intercepts, asymptotes, intervals of increase/decrease, local max/min, concavity and points of inflection. I got all the way to the step where I'm solving the concavity and I'm stuck. I found the f"(x) and it came out to be really large polynomial. I want to know how I can solve for the x of f"(x) without the use of a graphing calculator, when the polynomial has x^6 and x^8.
Thank you so much,
natalie
Answered by Harley Weston. |
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