Bài : Đo chỉ số mỡ sữa x ( tính theo %) của 130 bà mẹ sinh con ta được bảng số liệu:
Tìm các tham số của mẫu:
Mod(X);
2 2 2
X ; X ; S ; S ;S ' ; S '
x x x x

Chỉ số mỡ sữa dưới 4,2 thuộc loại tốt . Hãy tỉ lệ
ft
chỉ số mỡ
sữa tốt với độ tin cậy 98%.
Bài làm

Chỉ số [3,0 – 3,6) [3,6 – 4,2) [4,2 – 4,8) [4,8 – 5,4) [5,4 – 6,0) [6,0 – 6,6) [6,6 – 7,2)
mỡ sữa
Số bà mẹ 2 8 35 43 22 15 5

answer: what is the conflict?

step-by-step explanation:

*what has happened to new york city?

*what is in the time capsule?

* what did the kidz see that gave them hope?

*what will they do with what they find?

* how will they save the city?

* what challenges will they face along the way?

*what big choice will they make at the climax of the story?

* what lesson do they learn at the end of the story?

from the sentence, "tomorrow morning, akiko will arrive an hour late" depicts a third person perspective because it doesn't use any pronoun to replace akiko, the subject of the sentence, and it is in singular form since akiko is only one person.

step-by-step explanation:

the ratio of red paint to blue paint is always 9/7. that means that, whatever x's value, (4x+12)/(4x-4) has that same ratio. so, set up an equation and cross-multiply to solve for x:

9/7 = (4x+12)/(4x-4)

9(4x-4) = 7(4x+12)

36x - 36 = 28x + 84

8x - 36 = 84

8x = 120

x = 15

answer: 100

step-by-step explanation: