.

the probability that a bird is green (.30) is true

step-by-step explanation:

this is a geometric sequence with common ratio r

r = = = = 3

(a)

to obtain a term in the sequence multiply the previous term by 3

= 3 ← recursive rule

(b)

the n th term of a geometric sequence is

=

where is the first term and r the common ratio

= 6 × ← explicit rule

it changed by a factor of 2.

the measure of the unknown angle is 7.5