Hãy chọn câu đúng. Cho ΔABC, I, K lần lượt là trung điểm của AB và BC. Biết AC = 10cm.
Độ dài IK bằng:
Trắc nghiệm Đường trung bình của tam giác, của hình thang có đáp án
Group of answer choices

A. IK = 4cm.

B. IK = 5 cm.

C. IK = 3,5cm.

D. IK = 10cm.

Thirteen bowlers were asked what their score was on their last game. the scores are shown below 190,150,154,194,181,190,170,151,170,178,161,180 find the range of the bowlers score a.56 b.44 c.34 d.23

Aresearcher believes increased perceived control influence the well-being of residents at a nursing home. to test this , she allowed one group of residents to have control over their daily lies, (where to eat etc) . the other group of 5 residents had these deceisions made by staff. the resident's feelings of well-being were measured on a 10 point scale at the end of a one month trial period. is there a difference on well-being?

Round to the nearest ten thousandth.i dont get this