exam Maths Puzzle Numerical Ability

Multiply: 7u^6 * 4u^3
Multiple choice answers.
A) 11u^9
B) 11u^18
C) 28u^18
D) 28u^9

I get 28u^18 is this right?

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exam Other Question
it says draw pqr with pq=3 cm m(acute angle) p=35digrese m(acuteangle)q=70digrese how do you solve each system by substitution?