Perpendicular slopes multiply to -1, so are <em>negative reciprocals.</em>
-1 / -3 = 1/3
Answer: B. 1/3
After half hour=30 min you have 2×2500=5000 bacteria so you can use this into your equation to write:

and:

Apply the natural logarithm ln to both sides and get:

so

in units of

so your equation is now:

1] it t= 50 min substituting you get:

bacteria
2] if t= 8 h = 480 min you get:

bacteria
First, we need to define k because it is a missing zero;
Knowing that a(2)=0;
a(t)=(t-k)(t-3)(t-6)(t+3)
a(2)=(2-k)(2-3)(2-6)(2+3)=0
(2-k)(-1)(-4)(5)=0
(2-k)(20)=0
(2-k)=0/20
2-k=0
2=k
Therefore, the final equation is a(t)=(t-2)(t-3)(3-6)(t+3) with the zeros being (2, 3, 6, -3)
Hope I helped :)
Answer:
= −21
Step-by-step explanation:
3(5−6)−2(4+5)
=(3)(−1)−2(4+5)
=−3−2(4+5)
=−3−(2)(9)
=−3−18
=−21
brainliest please? :)