On a bicycle, Rosa rides for 3 hours and is 20 miles from her house. After riding for 5 hours, she is 32 miles away.What is Rosa's rate?

Rosa's rate is 6 miles per hour

Step-by-step explanation:

Rosa rides for 3 hours and is 20 miles from her house.

After riding for 5 hours, she is 32 miles away

Let x represents the number of hours

and y represents the number of miles away

(3,20)  and (5,32)

rate is the slope

to find rate we find change in miles over change in hours

so Rosa's rate is 6 miles per hour

3 strain would still alive after 48 hours

Step-by-step explanation:

Initial population of virus = 40000 grams

A certain virus is dying off at a rate of 18% per hour.

We are supposed to find  how much of the  strain would still be alive after 48 hours

Formula :

=Initial population

N(t)= Population after t hours

r = rate of decrease = 18% = 0.18

t = time = 48 hours

So,the  strain would still be alive after 48 hours=

Hence 3 strain would still alive after 48 hours