







Sampling distribution 
20171016 

Esther pose la question : I need 4digits combination of 235689 and without replacement. Thanks Penny Nom lui répond. 





Salary plus commission 
20171016 

Natasha pose la question : Veronika works at Future Shop and earns ₱10.50/h plus 6% commission on sales. Last week Veronika worked 40 hours. What was Veronika’s weekly gross salary if her total sales were ₱2050? Penny Nom lui répond. 





The distance between the origin and a moving point on a graph 
20171016 

Paulina pose la question : Find the rate of change of the distance between the origin and a moving point on the graph of y=x^2 +1 if dx/dt=2 centimeters per second Penny Nom lui répond. 





Three consecutive odd integers 
20171010 

Johanna pose la question : Three consecutive odd integers are such that the sum of the first and second is 31 less than 3 times the third Penny Nom lui répond. 





27000001 
20171009 

Tulashiram pose la question : If a× b =27000001, then what is the value of a & b ? Penny Nom lui répond. 





Five bales 
20171008 

John pose la question :
two answers were given... I believe both to be incorrect.
five bales weighed two at a time: weightx2 given: 110,112,113,114,115,116,117,118,120, and 121. It stated all combinations ie: ab,ac,ad,ad,bc,bd,be, etc. to arrive at the above 10 combined weights. I come up with the following...
Bale A= 54lbs, Bale B=56, Bale C=58, Bale D=59. and Bale E=62 pounds.
A+B=110, A+C=112, A+D=, B+C=114, B+D=115 ,A+E=116 ,C+D=117, B+E=118 ,C+E=120, and D+E=121 Penny Nom lui répond. 





An enclosure for some remote control boats 
20171003 

Roberto pose la question : I am trying to build a "ring" for our remote control boats, using irrigation pipe.
I'd like to use full 20' long sticks for the long sides and use eight of what we call
45s, which are actually 135' fittings to make the six short sides. If I know the length
of the two long sides, what would be the formula to find the exact lengths of the short sides?
Thank you. Penny Nom lui répond. 





The volume of a cone without calculus 
20171002 

Akash pose la question : How to find the volume of a cone without the knowledge of calculus? Penny Nom lui répond. 





The square root of 6 is irrational 
20171002 

John pose la question : http://mathcentral.uregina.ca/QQ/database/QQ.09.06/sylvia1.html
In the initial assumption of that proof, root 6 is assumed to be a/b where a and b have no common factors, but why does having a common factor make it irrational? Penny Nom lui répond. 





The importance of a comma 
20170930 

carolyn pose la question : the equation 2y + 53 = 165 represents the situation joel spent 165 dollars on a pair of jeans and two shirts at the same price what does y represent
price of a pair of jeans
price of a shirt
amount joel spent on the shirts
number of shirts joel bought Penny Nom lui répond. 





Macy and Camile's ages 
20170930 

carolyn pose la question : macy is 2 years older than Camille twice the sum of their ages is 52 which equation can be used to find camilles age x Penny Nom lui répond. 





How many pet dogs? 
20170926 

Michelle pose la question : In 2016 there were about 135 million households in the United States. 36.5% of the households own at least one dog. On average, these households have 1.6 dogs. How many millins of pet dogs were in the United States in 2016? Penny Nom lui répond. 





Four multiples of 10 
20170923 

Laudacir pose la question : Four multiples of 10 are added together.the total is a 3 digit number with three consecutive digits. What could the four number be? Penny Nom lui répond. 





Changing a mixed number to a decimal 
20170923 

karla pose la question : to change an improper fraction into a decimal 5 3/4 equals Penny Nom lui répond. 





Walking up and down a hill 
20170919 

Justina pose la question : At 2:20 p.m. Jack is at the top of the hill and starts walking down at the exact same time that Jill, who is at the bottom of the hill, starts walking up. If they maintain the uphill speed of 2mph and downhill speed of 4mph and the distance from the bottom to the top of the hill is 1.5 mi, at what time will Jack and Jill meet? Penny Nom lui répond. 

