joesw moer — SteemCN

The scientific notation 3.5 ×103 multiplied by 3 is
A. 1.05 ×102 B.1.05×1010 C. 1.05×103 D.1.05×109 E. 1.05×104
The scientific notation 8.2×10-4 + 5.4×10-4=………
A.1.35×10-5 B. 1.36×10-4 C.1.36×10-3 D.1.36×10-7 E.1.36×103
Which of the following is (are) true?
A.log⁡〖(xy) 〗=log⁡x + log⁡y B. (log⁡x )^n = n log⁡x C. log_10⁡1=0
D.log_x⁡x=1 E.log⁡(x/y)= log⁡x-log⁡y
Which of the following is (are) true?
A. 3 B. 9 C. 27 D. 81 E. x
The mean height of 6 boys is 4´2´´ . The mean height ot 4 girls is 3´9´´ .The mean height of
combined 6 boys and 4 girls is
A.4´1´´ B.4´ C. 3´11´´ D.3´10´´ E. 41/2´
For the sample 5,6,5,7,8,5,6,7,6,5 which of the following is (are) true?
1. The median is 6 2. the mean is 6 3. the mode is 5.
  A. 1 only B.2 only C. 3 only D. 1 and 3 only E. 1 , 2 and 3
For the sample 9,8,10,9,11,9,12,12 which of the following

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