The formula w=a+r×lnt, where t represents the time in hours, w represents the amount of fresh water produced in t hours, a represents the amount of fresh water produced in one hour and r is the rate of production, models the amount of fresh water produced from salt water during a desalination process. In one desalination plant, 15.26 cubic yards of fresh water can be produced in one hour (a) with a rate of production of 31.2 (r). Round answers to the nearest thousandth.

a) How much freshwater can be produced after 8 hours?
b) How many hours will it take to produce 200 cubic yards of fresh water as this desalination plant?

the answer for this question is 38

the answer would be d.

step-by-step explanation:

move all variables to the left side and all constants to the right side

(x−3)^2+(y−1)^2=16

this is the form of a circle. use this form to determine the center and radius of the circle.

( x − h ) 2 + ( y − k ) 2 = r 2

match the values in this circle to those of the standard form. the variable   r   represents the radius of the circle,   h   represents the x-offset from the origin, and   k   represents the y-offset from origin.

r = 4

h = 3

k = 1

the center of the circle is found at   ( h , k ) .

center:   ( 3 , 1 )

these values represent the important values for graphing and analyzing a circle.

center:   ( 3 , 1 ).

radius:   4