If `10^x=64 ,` what is the value of `10^(x/2+1)` ? (a) 18 (b) 42 (c) 80 (d) 81

If 10^(k)=64 , what is the value of 10^((k)/(2)+1) ?

If 10^(x)=64, what is the value of 10^((x)/(2))+1?18 (b) 42(c)80(d)81

If 8^(x+1)=64 , what is the value of 3^(2x+1) ? (a)1 (b) 3 (c) 9 (d) 27

If 8^(x+1)=64, what is the value of 3^(2x+1)?1 (b) 3 (c) 9 (d) 27

The average of 2, 7, 6 and x is 5 and the average of 18, 1, 6, x and y is 10. What is the value of y ? (a) 5 (b) 10 (c) 20 (d) 30

If the standard deviation of a distribution is 9, what is the value of variance? (A) 18 (B) 27 (C ) 81 (D) 36

What is the value of [log_(10)(5log_(10)100)]^(2)? a.1 b.2 c.10 d.25

If a-b=3 and a^(2)+b^(2)=29, find the value of ab. (a) 10 (b) 12 (c) 15 (d) 18

If x+1/x=2, then x^3+1/(x^3)=? (a)64 (b) 14 (c) 8 (d) 2

If (x-1)/(x)=3, then the value of 1+(1)/(x^(2)) is (a) 9(b) 10(c)11 (d) None of these