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A Parabolic Arch 2020-09-21
From Malen:
A hotel entrance makes a parabolic arch that can be represented by the quadratic function, y= -x^2-8x+24, where y is the height of the arch and x is the distance from wall to wall in the feet. What is the distance between the two walls of the arch.
Answered by Harley Weston.
my prcentage of years on earth is 2020-09-21
From Bill:
This Tuesday is my birthday and I will be 69. and I just wanted to know life ear is say earth is 6 billion years old I'm just curious to what percentage does my existence on earth reptresent I do realize that it's a flash in the pan
Answered by Penny Nom.
A problem involving distance, time, and rate. 2020-09-15
From Ruby:
Amy drove on the highways at 70 miles/hour to pick up fruits from her grandma’s garden in the morning.
She stayed there for two hours. When coming back in the afternoon, she drove on the local roads at 40 miles per hour to avoid traffic.
She spent a total of 8 hours for this trip, and drove a total 300 miles.
How many miles did she drive each way?

Answered by Penny Nom.
The surface area of a dome 2020-09-13
From Sue:
i need to know the outside square footage of a dome house 24ft across at the bottom and 16ft high so i know how much paint it will take to cover it.
Answered by Harley Weston.
9 games with 3 possible outcomes 2020-09-13
From Daniel:
Hi
I’d like to know how many different outcomes would be in a Soccer week played if there is 9 different games 2 teams and 3 outcomes Win, tie or lose

Thank you

Answered by Penny Nom.
Simultaneous equations 2020-09-05
From Paa:
a+b=8
a+c=13
b+d=8
c-d=6
find the value of each letter

Answered by Penny Nom.
Slope 2020-09-04
From Mark:
I'm trying to calculate slope over 157'.I have a drop of 9 1/8 inches. What fraction of an inch of fall do I have every 10 feet
Answered by Penny Nom.
The angular speed of a wheel 2020-09-03
From Catrina:
A car is moving at a rate of 75 miles per hour, and the diameter of its wheels is 2.6 in. Find the angular speed of the wheels in radians per minute.
Answered by Penny Nom.
Bearings 2020-08-30
From Tom:
A boy walks 5km due North and then 4km due East
I. Find the bearing of his current position from his starting point
II. How far is the boy now from the starting point

Answered by Penny Nom.
4 digits to unlock a padlock 2020-08-28
From Sophie:
I have forgotten the order in what the numbers go for my padlock! The numbers are, 0125, they don't have any repeats like, 0001, 0002. What are all possible the combinations? Help!
Answered by Penny Nom.
Arranging buttons in a row 2020-08-24
From Nick:
A sequence of 10 buttons can be arranged in a line. The buttons are identical except for colour, with each button being either red, blue or green.

Arranging buttons in a row How many sequences can be made where there are exactly 2 red buttons as part of the sequence of 10 buttons?

How many sequences can be made where there are exactly 4 red buttons as part of the sequence of 10 buttons?

Answered by Penny Nom.
A diameter of a circle 2020-08-19
From Apple:
One end of the the diameter of the circle with equation x^2+y^2-4x+4y=2 is (3,1). Find the coordinates of the other end of the diameter.
Answered by Penny Nom.
A window problem 2020-08-18
From Richard:
Hello,
I was hoping your math specialists could help me with some formulas. I have shapes with specific known variables need to calculate others.  

Example:
We make a straight legged arch, This shape has a width a overall height and a leg height, The leg height is always less then the overall, And the top is arched. We have the width, Height, and leg size.

  Need to calculate the length of the curve and sq ft of the shape.

Answered by Harley Weston.
A word problem with no algebra 2020-08-11
From Julie:
At 3pm, Bruce headed north at 30 km/hr. 2 hours later, Lucy headed south at 40 km/hr. At what time will they be 340 km apart
Answered by Penny Nom.
More on the last 2 digits of a^k = N 2020-08-07
From Jay:
I've seen solution methods for finding the last 2 digits of a^k = N, where a and k are known. My question is:

What if the number N is known and the last 2 digits are, say, ...62. Is there a way to find, for any given a, the value of k which will result in a number where the last 2 digits are ...62? and if that is possible, then do the same for a number with the last n digits (say 7 or 53 or something)?

Answered by Harley Weston.
 
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