C , I’m sorry if I’m wrong .
Y=3(t+2), x=4t
By the Pythagorean Theorem
d^2=x^2+y^2 and using y and x from the beginning and 8^2 for d^2:
64=16t^2+(3t+6)^2
64=16t^2+9t^2+36t+36
64=25t^2+36t+36
25t^2+35t-28=0 I'll just use the quadratic equation as this has no nice integer solutions :)
t=(-35±√(4025))/50 and since t>0
t≈0.5689 hr (34:07 in minutes and seconds :P )
This is the time elapsed for Zach
Im not really positive if this is right but I think it's 8
Translate
remembe that percent means parts out of 100
'of' means multiply
72 s 95 percent of what
72=0.95 times what
divide both sides by 0.95
80=what
the number is 80