The answer to 70 -7•7 is 21
7x-6=85
Add 6 to both sides
7x=91
Divide both sides by 7.
x=13
hope this helps.
P(t) = 646*0.66^t . . . . . exponential function for population
p(10) = 646*0.66^10 ≈ 10 . . . population in 10 years
Answer:
n=20
Step-by-step explanation:

Need a picture please so answer