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...be z it can be shown that if running speed / rowing speed = k , then sin z = w/ k will give the minimum time, which yields x = w/√( k ^2-1...

7) H 8) K 9) This would be -√6/4 -√2/4 and I don't see that listed. 10) I 11) B 12) J

... in working & explaining these for you. I think you have h and k switched in the half life equation. Also, the "/ h " isn't...

6. (R - 4)^2 = 144= K 7. (P + 2)^2 = 49=M 8. (N - 7)^2 = 2=F 9. (...2 = 10=Q 12. C - 9^2 = 20=D 13. (P + 13)^2 = 12= H 14. (R + 3)^2 = 24=J

1. g 2. c 3. f 4. k 5. i 6. j 7. b 8. h 9. d 10. e 11. a hope that helps

...that when k =0, he travels to point C and when k =1, he travels directly to A. We can then... know that he can row across the river at a rate of 8km/ h and can run at a rate of 6km/ h . We may express this in...

1) here, for car A , distance = 35km speed = 90 k / h time taken = distance / speed = 35 / 90 = 7/18...

...sqrt(6)/4 + sqrt(2)/4 = sqrt(6)/4 + sqrt(2)/4 ans = K Question 2 (cos(A + B) = ...2*sqrt(2) - sqrt(2)/4 -sqrt(6)/4 - sqrt(2)/4 ans = H Question 4 cos(A + B) = ...