In her science-fiction novel The Pride of Chanur and its sequels, author C. J.
Cherryh imagined an alien race, the stsho, which has three sexes instead of
two as we humans do. Thus, each stsho has three parents, which will be
referred to as X, Y, and Z instead of "mother" and "father." Here is the
beginning of a family tree for a certain stsho, named Tle-nle, showing gtst
three parents, gtst grandparents (G), and gtst great-grandparents (GG).
How many ancestors does Tle-nle have, going back through the fifth
generation of gtst family tree, counting Tle-nle gtst-self as the first
generation? When calculating the sum of the appropriate geometric series,
include the term 1 for Tle-nle gtst-self in your total.

Explanation:

Notice that, since every ancestor has 3 parents, the number of ancestors on each previous generation is the result of mulpitlying by 3.

That means that the ratio of the geometric series is 3.

This shows it:

The geometric series is:

Hence, the sum is: 1 + 3 + 9 + 27 + 81 = 121

b

step-by-step explanation:

the equation of a line in point- slope form is

y - b = m(x - a)

where m is the slope and (a, b) a point on the line

calculate m using the slope formula

m = (y₂ - y₁ ) / (x₂ - x₁ )

with (x₁, y₁ ) = (0, 4) and (x₂, y₂ ) = (3, - 5) ← 2 points on the line

m = = = - 3

with m = - 3 and (a, b) = (3, - 5), then

y - (- 5) = - 3(x - 3), that is

y + 5 = - 3(x - 3) → b

1st part is 64,000,000

2nd part 500,000

step-by-step explanation: