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A combination lock |
2020-09-29 |
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From Rourke:
how many possible combinations are there in a 4 digit lock with 6 numbers
which can repeat themselves.
Answered by Penny Nom. |
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Factoring an interest formula |
2020-09-29 |
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From Kenneth:
Hello
P + Pr has a common factor of P so it can be expressed as P(1 + r) after the P is factored out..
How does the "P" get in front of (1 + r)?
P/P + Pr/P = 1 + r What step is used to show that P is added in front of (1 + r)?
I thank you for your reply.
Answered by Harley Weston. |
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Is -1 an odd integer? |
2020-09-27 |
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From Nicole:
is -1 an odd integer?
Answered by Penny Nom. |
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The height of a tree |
2020-09-27 |
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From Kerissa:
A man height 1.2 m standing on top of a building 34.6m high views a tree some distance away he observes that the angle of depression of the base of the tree is 35 and the angle of depression of the top of the tree is 29, assuming that the tree stands of level ground. Determine the height of the tree.
Answered by Penny Nom. |
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A Parabolic Arch |
2020-09-21 |
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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. |
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my prcentage of years on earth is |
2020-09-21 |
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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. |
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A problem involving distance, time, and rate. |
2020-09-15 |
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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. |
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The surface area of a dome |
2020-09-13 |
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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. |
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9 games with 3 possible outcomes |
2020-09-13 |
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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. |
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Simultaneous equations |
2020-09-05 |
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From Paa:
a+b=8
a+c=13
b+d=8
c-d=6
find the value of each letter
Answered by Penny Nom. |
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Slope |
2020-09-04 |
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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. |
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The angular speed of a wheel |
2020-09-03 |
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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. |
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Bearings |
2020-08-30 |
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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. |
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4 digits to unlock a padlock |
2020-08-28 |
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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. |
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Arranging buttons in a row |
2020-08-24 |
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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. |
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