legyis cse

6600 feet : 2 miles =…………
A. 8:5 B. 5:8 C. 33:1 D. 22:1 E.3300:1

1. If 1/2x+y=2x, then x:y=……….
   A. 1:2 B. 2:3 C.3:4 D. 3:5 E. 4:5
2. The ratio 27:36 , expressed as a percentage, is
   A. 25% B. 45% C. 60% D. 75% E. 80%
   5.The ratio 2:x , expressed as a percentage , is 40%, then
3. 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
4. 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
5. Which of the following is (are) true?
   1.log⁡M/log⁡N =log⁡M-log⁡N 2.log⁡∛M=3 log⁡M 3.log_√a⁡M =2log_a⁡M
   A. 1 only B. 2 only C. 3 only D. 1 and only E. None of them
   6.Which of the following is (are) true?
   1. log_4⁡x=2log_16⁡x 2. log_b⁡x=3 log_(b^3 )⁡x 3. log_4⁡16= log_16⁡4