







Four digit combinations from 13480 
20200326 

From nancy: Good evening. I'm in a quandry. Can you help? I would like to know what 4digit combinations can be derived from 13480 no repetitions Answered by Penny Nom. 





The center and radius of a circle 
20200325 

From Riley: so it says find the center and the radius of the below circle
x^2+(y6)^2=121
i need help learning how to solve this Answered by Penny Nom. 





A hemisphere and a cylinder 
20200323 

From Monalizsha: Wat is the volume and the surface area of the hemisphere and cylinder (both are together)
The height is 12cm of the cylinder and the diameter is 6cm Answered by Penny Nom. 





Aaron and Bill's ages 
20200312 

From Heather: My granddaughter had this third grade math problem. Aaron is 4 times as old as his brother Bill. In ten years Aaron will be twice Bills age. What are their ages? Answered by Penny Nom. 





Sixdigit telephone numbers 
20200312 

From Lulamile: What is the probability that a sixdigit telephone number has no repeated digits? The telephone number cannot begin with a zero Answered by Penny Nom. 





A times table in base 5 
20200311 

From Felix: Design a time table for numbers 110 in base 5 Answered by Penny Nom. 





Is there an equation to find what percent of 0 is 1? 
20200309 

From Asher: Question: Is there an equation to find what percent of 0 is 1.
I remember learning quite a long time ago that the answer inst 0 and it isn't infinity. I'm pretty sure it was something like %=0 approaching infinity or %=1 approaching infinity. And I know it depends what value you assign the numbers i.e. dollars or temperature. Furthermore, is asking "what percent 1 dollar is of 0 dollars" the same question as "what percent profit do you make from selling something worth 0 dollars for 1 dollar."
Thank you for your time and consideration
Asher Answered by Penny Nom. 





Sam and Claudia go on a bike hike 
20200303 

From Christie: Sam and Claudia start at the same time on a bike hike of 150 miles. Sam travels 3 miles per hour faster than Claudia and finishes the trip 8 1/3 hours before Claudia. At what rate in miles per hour does Sam travel? Answered by Penny Nom. 





Covering 1 acre, 6" deep 
20200302 

From Jim: How many cubic yards does it take to cover 1 acre 6" deep.
Thank you Also, can you show me how you determined that answer. Answered by Penny Nom. 





Fireman Fred needs to stay fit 
20200302 

From Chamundeswari: How do I explain this problem to a year 3 kid?
Fireman Fred needs to stay fit for his job. He runs 4.5km, 4 mornings, a week . if it takes him 4 minutes and 15 seconds on average to run 1km, how much time does he spend running over 4 weeks? Answered by Penny Nom. 





The volume of a berm 
20200228 

From jason: how much dirt is in an 20'w 12't 1350'l berm Answered by Penny Nom. 





A straight line graph 
20200226 

From Penehafo: I have a problem of drawing a straight line graph by the equation y=2x1 Answered by Penny Nom. 





The height of an isosceles triangle 
20200223 

From Reagan: I need to find the height of an isosceles triangle with a base of 6 and sides of 4 units. How do I find it? Answered by Penny Nom. 





Degrees, minutes and seconds 
20200221 

From Jonathan: If a cone has an angle of 22 degrees, when i place it flat on a surface, the new resulting central angle is now at 68.69123834, but how come when i saw it on my friend it say 68 degree and 40 minutes, what is this minute? Answered by Penny Nom. 





30% profit 
20200220 

From Sidra: A car dealer bought a car for £7500 and sold it for 30% profit.
For how much did he sell the car? Answered by Penny Nom. 

