A microbiologist during a study on a culture of 250 bacteria noticed that he can model the number of bacteria after t number of days by the equation B = 250 X 4^t. In this equation what does 4 represent?

A The number of bacteria increases by t after 4 days
B. The number of bacteria increases by a factor of teach day for 5 days
C. The number of bacteria increases by a factor of 4 each day
D. The number of bacteria increases by 4 each day

3x = 729 solve for x plz . it's urgent. will mark

If i purchase a product for $79.99 and two accessories for 9.99 and 7.00 how much will i owe after taxes applies 8.75%

Exercise: counting committees 0.0/2.0 puntos (calificable) we start with a pool of n people. a chaired committee consists of k≥1 members, out of whom one member is designated as the chairperson. the expression k(nk) can be interpreted as the number of possible chaired committees with k members. this is because we have (nk) choices for the k members, and once the members are chosen, there are then k choices for the chairperson. thus, c=∑k=1nk(nk) is the total number of possible chaired committees of any size. find the value of c (as a function of n ) by thinking about a different way of forming a chaired committee: first choose the chairperson, then choose the other members of the committee. the answer is of the form c=(α+nβ)2γn+δ. what are the values of α , β , γ , and δ ?