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Alex rents a car for one day |
2019-10-31 |
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From Arshia:
Alex rents a car for one day. The charge is $25 plus $0.20 per mile. Alex wants to spend exactly $110. How many miles can he drive?
Answered by Penny Nom. |
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The largest integer k so that that 3335^k is a divisor of 3336! |
2019-10-29 |
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From Brandon:
Hello my name is Brandon and I having difficulties in solving the following question: Given the number 3336! = 1.2.3.4........................3336 . What's the greater positive integer number k with the condition that 3335expk is a divisor of 3336!
Thanks for your help.
Answered by Penny Nom. |
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Even 5 digit palindromes |
2019-10-24 |
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From daniel:
How many palindromes of 5 digits are even?
Answered by Penny Nom. |
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The center of a circle |
2019-10-24 |
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From Patrick:
I'm trying to find a quick calculation to find the center of the circle that will touch the 3 points of an isosceles triangle.
Known dimensions are length of the triangle base and the height from the top point to the middle of the base.
Thanks in advance,
Kind regards,
Patrick
Answered by Penny Nom. |
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How many numbers from the set have the sum of its digits equal to 2? |
2019-10-24 |
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From Marcel:
Hello. My question is the following: Given the set {1,2...........10exp2019}, how many numbers from the set have the sum of its digits equal to 2?
I got some of them : 2 20 200 2000 20000 .......2. 10exp2018 11 110 1100 11000 110000....101 1010 10100 101000 1010000....10011 10010 100100 1001000 1010000.....10001 100010 1000100 10001000,,,,,,100001 1000010 10000100.......
My problem is that I have difficulty in finding a strategy to obtain the exact quantity of numbers.
Please help me, thanks
Answered by Penny Nom. |
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The perimeter of a piece of a circle |
2019-10-18 |
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From Arwin:
The radius of a circle is 17 cm. A chord XY lies 9 cm from the centre and divides the circle into two segments. Find the perimeter of the minor segment.
Answered by Penny Nom. |
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The domain of f + g |
2019-10-16 |
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From Angel:
The domain of f+g when f(x)=8x+3 and g(x)=1-5x
Answered by Penny Nom. |
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How do you find the length and the width if all you had was area? |
2019-10-16 |
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From Ali:
So, How do you find the length and the width if all you had was area?
Answered by Penny Nom. |
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Simultaneous equations |
2019-10-16 |
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From deepak:
This is too complicated please help me
8/x - 10/y = 1 and x+y=9
Answered by Penny Nom. |
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The difference of two numbers is 42 |
2019-10-14 |
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From Patrick:
The difference of two numbers is 42 and the larger number is 8/5 of the smaller number. Find the two numbers.
Answered by Penny Nom. |
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Arranging 10 digits |
2019-10-09 |
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From Laxmi:
1)The integers 0 to 9 are arranged along a straight line in some order.a) find a possible arrangement in which the sum of any three adjacent numbers is less than 15.b)is there an arrangement of this kind 0 is not included in the numbers.
Answered by Penny Nom. |
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A binomial probability question |
2019-10-08 |
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From venni:
The Medassist Pharmaceutical Company receives large shipments of aspirin
tablets and uses this acceptance sampling plan: Randomly select and test 24
tablets, then accept the whole batch if there is only one or none that doesn’t
meet the required specifications. If a particular shipment of thousands of
aspirin tablets actually has a 4% rate of defects, what is the probability that
this whole shipment will be accepted?
Answered by Penny Nom. |
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Four fours |
2019-10-03 |
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From Irene:
Using number 4, four times with any equation and the answer will be -2 and -5
Answered by Penny Nom. |
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The binomial distribution |
2019-10-01 |
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From PY:
An on-line game called ‘Shop Quiz’ is held by an e-commerce platform, from Monday to Friday
every week. It consists of 8 multiple choice questions (MCQ) and each question has four options (A, B, C, D). Only one option is the correct answer. People who are able to correctly answer all 8
questions are winners and will be awarded a number of on-line shopping credits.
Let X represent the number of questions that a person can answer correctly in a ‘Shop Quiz’.
1) Explain why Binomial distribution might NOT be a suitable distribution for the random variable
X.
Mr. Saul likes playing the quiz, however, he is afraid that he might not have the necessary knowledge to answer the quiz questions. (The quiz questions cover a variety of topics including science, history, entertainment, sports and geography, etc.) Therefore, he tries to win the game by simply guessing the answers to each question.
Answered by Penny Nom. |
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Four less than three times a number is 20 |
2019-09-29 |
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From Linda:
four less than three times a number is 20,what is the number?
Answered by Penny Nom. |
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