Theo dõi phát triển dân số xã X thu được số liệu sau: Z năm X (số dân, người) Y (tỷ lệ chết, đv: 1)
2016 4.670 0,0099
2017 4.860 0,0074
2018 5.050 0,0099
2019 5.170 0,0064
2020 5.470 0,0059

a) Tính hệ số tương quan rxy và cho nhận xét ?
b) Hỏi năm 2021 dân số xã X là bao nhiêu

i believe the correct answer is b.

the correct answer is

c. 4

step-by-step explanation:

the given polynomial is

the degree of the polynomial is the highest exponent which is 4.

the -4 is called the leading coefficient.

this polynomial has only one term so it is a monomial.

the correct answer is option c.

570, the answer is 570, hope it

all three statements are true

step-by-step explanation:

a shipping fee of 5% is charged online with every item purchased online

first let's just take each option and calculate them based on this, to see if the answers matched

keith buys a 40 dollar book

40 x 0.05 = 2

therefore there will be a two dollar fee on keith's book

40 + 2 =42

the first statement is true

a chair costs $80

80 x 0.05 = 4

80 + 4 = 84

the second statement is true

george buys a 20 dollar calculator

20 x 0.05 = 1

20 + 1 = 21

the third statements are true

all three statements are true