A population of bacteria is growing according to the exponential model P =100e.70t, where P is the number of colonies and t is measured in hours. How many colonies are present initially?
A)2.72
B)70
C)100
D)120
Thor invests some money in an account earning 8% interest, compounded continuously. After how many years will he double his investment? [UseA = Per androundanswerto the nearest tenth.]
6.2 years
7.5 years
8.7 years
9.9 years
An exponential function is written in standard form: y = a·b^x + c. Which statement is NOT true?
b can equal 1
b must be greater than 0
c c

Question

A population of bacteria is growing according to the exponential model P =100e.70t, where P is the number of colonies and t is measured in hours. How many colonies are present initially? 
A)2.72	
B)70	
C)100	
D)120
Thor invests some money in an account earning 8% interest, compounded continuously. After how many years will he double his investment? [UseA = Per androundanswerto the nearest tenth.] 
6.2 years	
7.5 years	
8.7 years	
9.9 years 
An exponential function is written in standard form: y = a·b^x + c. Which statement is NOT true? 
b can equal 1	
b must be greater than 0	
c c

retireed · Answer

Question 1)    It is the base value also it is when t = 0

retireed · Answer

Question 2 is similar to a question was on last night.

     FV = P e^rt     FV is the future value which equals 2P  where P is the Present Amount

     2P = P e^(0.08 t)     the Ps cancel solve for t

retireed · Answer

The third question needs to be reposted.  The answers are incomplete.

anonymous · Answer

An exponential function is written in standard form: y = a·b^x + c. Which statement is NOT true? 
b can equal 1	
b must be greater than 0	
c can be negative or positive	
x can be negative or positive