Stats 10 factory manager is monitoring the quality of production of a small battery powered toy. the factory produces 600 toys in an hour. thirty toys are tested from each hour’s production. which one of the following statements is the most accurate? select one: a. the toys being tested are the sample. the factory’s total production is the population. b. the toys being tested are the sample and the sample size is 30. all toys produced in that hour is the population. c. none of these statements accurately describe this situation. d. the toys being tested are the population. all toys produced in that hour is the sample and the sample size is 600.

the answer is b. 60. each interior angle in 120, so the exterior angle must be 60 in order to add up to 180

step-by-step explanation:

, and

for

step-by-step explanation:

we can analyze the pattern at which the terms increase. let us denote , , , so that we can call

note the following:

the pattern: to get the next term value, we just add the next term number (e.g. 1st, 2nd, to the previous term value (term values are the given numbers in the question, 1, 3, 6, 10, 15,

from , to get to , we add

from , to get to , we add

etc.

we need to form a recursive formula, a formula that has the next term as a function of the previous term. so a possible recursive formula can be

, and for