A culture of bacteria starts with 505050 bacteria and increases exponentially. The relationship between BBB, the number of bacteria in the culture, and ddd, the elapsed time, in days, is modeled by the following equation.
B=50⋅10d2
In how many days will the number of bacteria in the culture reach 800{,}000800,000800, comma, 000?
Give an exact answer expressed as a base-ten logarithm.

Two parallel lines are crossed by a transversal. what is the value of x? x = 40 x = 70 x = 110 x = 130

Select the quadratic that has root x = 8 and x = -5

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)