 |
|
|
|
|
|
|
|
|
.9 repeating plus .2 repeating |
2008-06-10 |
|
From megan:
How do you express the addition of .9 repeating plus .2 repeating?
Answered by Penny Nom. |
|
|
|
|
|
|
An ellipse and circle with the same area |
2008-06-09 |
|
From Michael:
The area of the ellipse if equal to the area of a circle with radius=40 ft.
Find the values of a and b using appropriate algebraic techniques, not basic math computations.
A=pi ab and satisfy the constraint a+b=100????
Answered by Penny Nom. |
|
|
|
|
|
|
Geometric shapes that are the same |
2008-06-09 |
|
From tia:
what is the name used for shapes that are exactly the same?
Answered by Harley Weston. |
|
|
|
|
|
|
How many different ways can cards fall when shuffling? |
2008-06-09 |
|
From Twyla:
How many different ways can cards fall when shuffling? In other words,
if you have 52 numbers, each one unique, how many different ways can
they be arranged, using each number only once?
Answered by Penny Nom. |
|
|
|
|
|
|
All wiffs are miffs and all miffs are kiffs. |
2008-06-08 |
|
From Allison:
All wiffs are miffs. all miffs are kiffs. There are 25 wiffs. There are 76 kiffs. 33 kiffs are not miffs. How many miffs are not wiffs?
Answered by Penny Nom. |
|
|
|
|
|
|
Geometric sequences |
2008-06-08 |
|
From Rita:
A geometric sequence is given. Find the common ratio and write out the first four terms.
(1) {(-5)^n}
(2) {(2^n)/(3^(n - 1)}
Answered by Penny Nom. |
|
|
|
|
|
|
calcul heures et minutes |
2008-06-08 |
|
From cadare:
je n'arrive pas à comprendre et resoudre mes problèmes d'heures et de minutes,ex parti à 22h30, j'arrive à 7h15 quelle est la durée du trajet
Answered by Claude Tardif. |
|
|
|
|
|
|
Arclength |
2008-06-07 |
|
From prem:
i am engineer, i need the formula for calculate the arclength by using only chord length and radius only
Answered by Penny Nom. |
|
|
|
|
|
|
g(m-1,2n)+n |
2008-06-07 |
|
From Florence:
What does g(m-1,2n)+n for m>0, n>=0 mean.
Answered by Penny Nom. |
|
|
|
|
|
|
90% of gross leaseable footage |
2008-06-07 |
|
From Rosalind:
90% of gross leaseable footage in the shopping center, being 394,577, excluding that square footage leased by major anchor tenants, being 284,747. Would you deduct the 284,747 from the 394,577, then multiply by the 90%. Or would you multiply the 394,577 by the 90%, then deduct the 284,747?
Answered by Penny Nom. |
|
|
|
|
|
|
How many gallons of oil will be needed to raise a 4" plunger 25 feet? |
2008-06-06 |
|
From cory:
How many gallons of oil will be needed to raise a 4" plunger 25 feet?
Answered by Penny Nom. |
|
|
|
|
|
|
The positive real zeros of f(x) = x^4 + x^3 - 7x - 1 |
2008-06-06 |
|
From CiCi:
How many positive real zeros does the function f(x) = x4 + x3 - 7x - 1 have?
Answered by Janice Cotcher and Harley Weston. |
|
|
|
|
|
|
Filling a hole with sand |
2008-06-05 |
|
From greg:
I have a 18 ft. diameter circle and need to put 2 in. of sand in it i need to know how much sand in cubic yards and tons
Answered by Harley Weston. |
|
|
|
|
|
|
The mean and variance |
2008-06-05 |
|
From Donny:
An investment will be worth $1,000, $2,000, or $5,000 at the end of the
year. The probabilities of these values are .25, .60, and .15, respectively.
Determine the mean and variance of the worth of the investment.
Answered by Harley Weston. |
|
|
|
|
|
|
The volume of a hexagonal pyramid |
2008-06-05 |
|
From Angie:
My son is working on a hexagonal pyramid. The base is 4 and the slant height is 6. We know that the answer is 48 times the sqrt of 2. We don't know how they got it. We attached the drawing of it.
Answered by Penny Nom. |
|
|
