Hiya i have attempted some indices questions, i was just woundering if anyone could check these to make sure im heading in the right direction with this subject. If these are wrong i would be most grateful if someone could correct me. thankyou

simplify:

1. 10^-1 x 64^1/2 x 8^0

=0.8

2. 5a^2b x 2a^1/2b

=10a^5/8b^2

3. 3b^1/2 x 2b^1/2 x 6b^-1

=36b

4.7pq

14p^2q^-2

=0.5p^-1q^3

5.(3xy)^24xy^1/2

=2.25xy^1.5

6.√s^2t^4 x 3√8s^3t^9

st

=8^1/3s^2t^4

7. 2a^1/2b^1/2c^-1/2 x 3a^3/2b^1/2c^3/2

=6a^4/2bc

8. (a^2b^3)^2 x a^-2b^-1

=a^2b^8

9. (5ab)^-2 x 15a^2b^3

= 0.6ab

10. 3x^1/2y^-1 x 5x^3/2y^-2

= 15x^4/2y^-3

11.3√27p^6q^9

√9pq

= 3^5/6p^5/2q^7/2