Ahair salon charges a fixed rate of $25.00 for a haircut and then an additional $15 for any service . write a function to model the cost of services there and then determine how many services tou had iy you werecharged $25

a. f(x)= 15x+25; f(0)= 25
b.)f(x) = 25x+15; f(.4) =25
c.) f(x) = 15 x +25; f(25) =400
d.) f(x) = 25x +15; f(25) =640

The answer is A, it is 15x because the x is the number of services. The base rate is $25 so f(0) means 0 services so only $25

The answer is A, it is 15x because the x is the number of services. The base rate is $25 so f(0) means 0 services so only $25

Step-by-step explanation:

linearly: 8560 bacteria

exponentially: approximately 75233 bacteria

step-by-step explanation:

assuming it is not exponential (we would have some really complicated logarithms), let's say it is linear. then, after 5 hours, it increased by 1200 bacteria, so every hour it increases by 240 bacteria. this means that after 19 hours, we get 19 * 240 + 4000 bacteria or 3800 + 760 + 4000 = 7800 + 760 = 8560 bacteria.

because it says round your answer, i will do this exponentially (with a calculator, of course). first, we need to find how much it multiplies by every hour, by taking the 5th root of 52/40 or 13/10. this is approximately 0.167. we still need to add 1 to this, because we are multiplying by that number, not adding that amount of the number. now, we just calculate 4000 * (1.167)^19. use a calculator to get approximately 75232.6, or 75233.

1. d.90

2. e. none of these (80)

3. a. 0

4. b. 6

5. e. none of these (10)

6. a. 5