The second part is thiss

Step-by-step explanation:

Question b has already been answered in part one. This is an exponential function.

C) 7 is the initial number of people who received the email;

7*2^n is the number of people who receive the email on day n;

2 is the factor of which the number of people increases each day.

D) On day 5,

people will have received the email.

E) 2; 0 (no people has received the email on day 0). The equation is

With x in the natural numbers

the first one, all those points on the line just make a strait line.

80 the answer is 80

step-by-step explanation: