Score: Name:
Unit #4 - Lesson #12 Exit Ticket: A population of bacteria can be modeled by P(t) = 540e0.121 where t is the
number of hours since 540 bacteria were recorded.
(a) How many bacteria does the model predict will (b) Algebraically determine how many hours, to the
be present after 5 hours. Round to the nearest nearest tenth, it will take for the population to
whole number
reach 2000.
I
ments

△cde maps to △stu with the transformations (x, y) arrowright (x − 2, y − 2) arrowright (3x, 3y) arrowright (x, −y). if cd = a + 1, de = 2a − 1, st = 2b + 3 and tu = b + 6, find the values of a and b. the value of a is and the value of b is .

The position of a moving particle is given by the position function: f(t)=-9t-t^2-0.2t^3+0.1t^4 0 a. at what time does the particle reverse direction? b. when is the displacement positive? (round one decimal place and answer in interval notation) c. when is the displacement negative? (round one decimal place and answer in interval notation) d. when is the particle’s acceleration positive? (round one decimal place and answer in interval notation) e. when is the particle’s acceleration negative? (round one decimal place and answer in interval notation)

25) 56(1) = 5b a. identity property of addition b. identity property of multiplication c. commutative property of multiplication d. commutative property of addition