Suppose r varies directly with t and that r = 25 when t=25 . What is the value of r when t = 7?
1 Answer
Jul 24, 2018
Explanation:
#"we are given "rpropt#
#"to convert to an equation multiply by k the constant"#
#"of variation"#
#r=kt#
#"to find k use the given condition"#
#r=25" when "t=25#
#r=ktrArrk=r/t=25/25=1#
#"equation is "r=t#
#"thus when t = 7 "r=7#
