 |
|
|
|
|
|
|
|
|
Plotting y=f(x)+2 |
2013-01-21 |
|
From Gavin:
how would you plot y=f(x)+2
Answered by Penny Nom. |
|
|
|
|
|
|
How many students have neither brown hair or hazel eyes? |
2013-01-20 |
|
From Julie:
There are 28 students in a class. 15 have brown hair, 17 have hazel eyes, and 10 have both. How many students have neither brown hair or hazel eyes?
Answered by Penny Nom. |
|
|
|
|
|
|
Solve 2sin(2(theta))+sqrt(3)=0 |
2013-01-19 |
|
From Kaitlyn:
how do you solve 2sin(2(theta))+sqrt(3)=0 with the interval [0,2pi)
Answered by Penny Nom. |
|
|
|
|
|
|
Maximize profit |
2013-01-19 |
|
From Chris:
A firm has the following total revenue and total cost function.
TR=100x-2x^2
TC=1/3x^3-5x^2+30x
Where x=output
Find the output level to minimize profit and the level of profit achieved at this output.
Answered by Penny Nom. |
|
|
|
|
|
|
5 1/2 cubic feet of sawdust |
2013-01-19 |
|
From Vina:
I have a bale of sawdust that containes 5 1/2 cubic feet. How many will I need to make a cubic yard?
Answered by Penny Nom. |
|
|
|
|
|
|
An equilateral triangle inscribed in a circle |
2013-01-17 |
|
From Nicole:
How do you find the shaded region of a circle if an unshaded equilateral triangle in inscribed in it. The only other things I know about the problem are that the side lengths of the equilateral triangle are 14 inches.
Answered by Penny Nom. |
|
|
|
|
|
|
The weight of a pipe full of water |
2013-01-16 |
|
From joe:
how do you figure out the weight of a pipe full of water
Answered by Harley Weston. |
|
|
|
|
|
|
A balance puzzle |
2013-01-14 |
|
From Emily:
I'm stuck on this problem and feel that it can't work! The problem is: there is a door with a balance scale on it. In order to open the door, you have to use the 5 weights to balance the scale. On the left side you have 2 boxes to place the weights and on the right side you have 3. You're 5 weights are as follows: 1lbs, 2lbs, 3lbs, 4lbs, 5lbs. How do you place the weights so that the scale is balanced?
Answered by Penny Nom. |
|
|
|
|
|
|
Percent as a fractional relationship |
2013-01-14 |
|
From Kenneth:
What does the following indicate?
"A percent is another way of expressing the ratio or fractional relationship
of two numbers."
I know what a ratio is, but the term "fractional relationship" confuses me.
I thank you for your reply.
Answered by Penny Nom. |
|
|
|
|
|
|
A shed roof |
2013-01-12 |
|
From christine:
A roof on a shed is 7.3 ft wide has an incline of 20 degrees what is the height?
Answered by Penny Nom. |
|
|
|
|
|
|
A large ditch |
2013-01-11 |
|
From steve:
hi
i have a large ditch to make a road entrance accross, the ditch is a green field on one side
and a highway on the other side
the ditch depth is 1.8m on the field side and 3.2 on the highway side
the culvert pipe is 1,2m in diameter
are you with me so far?
the entrance from the highway will be 26m wide tapering in to 6m - ,20 m in from the highway
there will be a concrete slab of 150mm over the top
the fall from highway to field must not exceed 1/8
any ideas how much stone it will need
Answered by Harley Weston. |
|
|
|
|
|
|
How fast are we approaching each other? |
2013-01-11 |
|
From Heather:
If I am skating at 7 mph, and a car drives towards me at 15 mph, how fast are we approaching each other?
Answered by Penny Nom. |
|
|
|
|
|
|
The side lengths of a triangle |
2013-01-07 |
|
From Katie:
How do I find the side lengths of a triangle knowing the base and its height?
Thank you,
Answered by Penny Nom. |
|
|
|
|
|
|
A trig identity |
2013-01-04 |
|
From Tehmas:
Prove sinC+sinD=2sin(C+D/2)cos(C-D/2)
Answered by Harley Weston. |
|
|
|
|
|
|
The quadratic formula |
2013-01-03 |
|
From itsel:
Find the discriminant ans use it to determine the use the quadratic formula to solve the equasion -2x^2+3x+2=0
Answered by Penny Nom. |
|
|
