A. Because the denominator are like multiples
We have that
<span>A).Formulate a recursive sequence modeling the number of grams after n hours.
a(n) = 0.75*a(n-1)
</span>B) .Use the model to calculate the amount of contaminants after the third hour of the experiment.
<span> for the first hour
</span>a(1) = 0.75*a(0)
<span>a0=400 g
a1=(3/4)400 = 300 g
for the second hour
</span>a(2) = 0.75*a(1)
<span>a1=300 g
a2=(3/4)300 = 900/4 g
for the third hour
</span>a(3) = 0.75*a(2)
<span>a2=900/4 g
(3/4)900/4 = 2700/16 = 168.75 g
the answer is </span>168.75 g
An infinite series contains an infinite amount if values within a set S({}. A finite series contains a certain am0unt of values (for example, the numbers from 1 to 10)
The first one is a finite set since it has a known amount of values. This can be seen as a tangible set. The second set has an unknown end. This makes it intangible.
Mark Brainliest Please
Answer : 1:9
volume = h(pi)r^2 = height times pi times radius squared
volume of cylinder A is 3pi
volume of cylinder B is 3pi(3)^2 = 27pi
raito of volume A to volume B is 3pi/27pi = 1/9
