The New York Road Runners is an organization that promotes running to bring youth together with a sense of community. The organization states that the average time that it takes its runners to complete a 5K race is 29 minutes with a standard deviation of 4 minutes. Assume that the times are normally distributed. 1. A single runner is chosen at random. What is the probability that the amount of time taken by that runner was less than 28 minutes? 2. You randomly select 100 runners. What is the probability that the average amount of time taken by the 100 runners was less than 28 minutes?

Q: Tracy's first four test grades are 85, 89, 87 and 96. What is the lowest grade Tracy can get on the…

A:

Q: 7X+2 6 + 2X-9 15 2X-1 4

A: As per guidelines, at a time only one question can be answered.Please repost for other questions.

Q: Find a2, a3, a4, a1= -3,  an= 10+2an-1

A:

Q: REVIEW ADDITI Y-5, when Y= -12 Answer: -8+ K, when K-6 Answer:

A: To find the given expressions

Q: x+1 x-3

A: Here the question is to find the value of x satisfying the given relation. The given relation is ,…

Q: 2 -1 Simplify: 2+1 -3v+2

A:

Q: Divide showing your work to receive full credit (a* + 45a +18a?) - 9a

A:

Q: 3×+5=23

A: this is a simple equation question  we will simplify by using the maths calculation rule.

Q: 6. Write the addition and multiplication tables for Z7.

A:

Q: The average exam score of a math class is 78. The standardized value of a student’s exam score in…

A:

Q: Translate this sentence into an equation. 105 is the product of Goran's score and 7. Use the…

A:

Q: can you explain more about the second part that you came up with -2 and 5 .  thanks

A:

Q: The expression - 260 + 18m represents a submarine that began at a depth of 260 feet below sea level…

A:

Q: /- wiite ay 2. -5

A:

Q: 23) 9 &x + 10

A:

Q: 8+89 78 ¹}₁-T 7

A: The given expression is s+2s2-6s+8 make the partial fractions of the given expression…

Q: 2 6X こ

A:

Q: y each Lation exprision -12X+20 Dmplife 1-100

A:

Q: I would like to ask why you subtracted 3-3 for question a should be 0?

A: From given data we have : mean μ=3Standard deviarion σ =2

Q: Drew is a farmer from Bulacan who plants palay and corn in his 12 hectares of land. Every planting…

A: 1st we will represent all data in tabular form and then form a Linear programming problem , Then…

Q: V3 b. 4+/12

A:

Q: passes through (-4, -3)

A: Given: (-4, -3), (-9, 26), and (-3, 3

Q: How do you solce part d?

A: Let, X= the number of incoming calls involving a fax messages among 25 incoming calls. This…

Q: V-3•V-6 -3 V2

A:

Q: 3. Simplify: 1-2 41-8

A:

Q: Explain how to simplify V10- V5.

A: One of the property of a square root function is :a.a=a2=aAlso, a.b=b.a  (commutative property)So,…

Q: -2 -3 2 1- - -1

A:

Q: Find a . b. a = (-3,-1), b = (-1,8)

A:

Q: can u double check and answer this again

A:

Q: 7- 7+3 7-2 + 3 北

A: Solution ) ( y + 3 )/( y - 2 ) + ( y - 3 )/( y + 1 )  L.C.M. of ( y - 2 ) ( y + 1) = ( y - 2 ) ( y +…