anferneebcoleman
09.04.2020 •
Mathematics
7. As reported in Runner's World magazine, the times of the finishers in the New Your City 10-km run are normally distributed with mean 61 minutes and standard deviation 9 minutes.
(a) Determine the percentage of finishers with times between 55 and 70 minutes. (b) Determine the 5% percentile of finishing times.
Solved
Show answers
More tips
Answers on questions: Mathematics
- M Mathematics Acollection of quartersquarters and dimesdimes is worth $10.90 there are 55 coins in all. find how many of each there are...
- M Mathematics Acertain vibrating system satisfies the equation u′′ + γu′ + u = 0. find the value of the damping coefficient γ for which the quasi period of the damped motion is 50% greater...
- M Mathematics Age of a is twice of b if sum of both ages is 18 what is the age of b...
- M Mathematics Michael drove from orlando to jacksonville in 2 2/3 hours. the next day he drove from jacksonville to savannah in 4 4/7 hours. what was michael’s total driving time from...
- M Mathematics If charlene brewster has times of 8.4, 8.6, 8.3, 8.5, 8.7 ans 8.5 and a performance rating of 110% percent, what is the normal time for this operation? is she faster or...
- M Mathematics The function arcsine can also be defined as?...
- M Mathematics What shape has 6 sides? question 10 options: pentagon hexagon decagon octagon save...
- M Mathematics For f(x) = 2x + 3 and g(x) = x2 – 8, find (f + g)(x) a. x2 + 2x + 11 b. 2x2 – 5 c. 2x3 – 48 d. x2 + 2x – 5...
- M Mathematics Ashley is making cookies. the recipe calls for 3/4 of a cup of sugar. she needs to make five batches of cookies. how many cups of sugar does ashley need?...
- M Mathematics Zakai cuts a piece of birthday cake as shown below. what is the volume of the piece of cake?...
Ответ:
length of a rectangular is 4x
breadth of a rectangular is 3x
perimeter is 140m
perimeter of rectangular is
140 = 2(l + b)put the value and you got the value of x
then;
find area
then put the value of length and breadth and x also
then you got the answer...