Lin and Jada each walk at a steady rate from school to the library. Lin can walk 13 miles in 5 hours, and Jada can walk 25 miles in 10 hours. They each leave school at 3:00 and walk 3 and 1/4 miles to the library. What time do they each arrive?

Step-by-step explanation:

Given parameters:

Rate of walking by Lin = 13 miles in 5 hours

Rate of walking by Jada  = 25 miles in 10 hours

Distance walked = 3.25 miles

Time of take off = 3:00

Solution:

The rate of their walking amounts to their speed;

             Speed  =

Speed of Lin  =   = 2.6 miles/hr

Speed of Jada =  = 2.5 miles/hr

To find the time; make it the subject of formula and solve for each person;

                       Time  =

 Time of Lin  =  = 1.25hr    = 48 minutes

  Time of Jada  =   =  1.3hr   = 47 minutes

Time for each to arrive;

              Lin  = 3.00 +  1.25hr  = 4:25

              Jada  = 3.00 +  1.30hr    = 4:30

the above table 1 will calculate the population size (n) after a certain length of time (t). all you need to do is plug in the initial population number (no), the growth rate (r) and the length of time (t). the constant (e) is already entered into the equation. it stands for the base of the natural logarithms (approximately 2.71828). growth rate (r) and time (t) must be expressed in the same unit of time, such as years, days, hours or minutes. for humans, population growth rate is based on one year. if a population of people grew from 1000 to 1040 in one year, then the percent increase or annual growth rate is 40/1000 x 100 = 4 percent.

step-by-step explanation:

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step-by-step explanation:

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