exam Maths Puzzle Numerical Ability

The function y=2x^2+x+3 has a minimum value....is that correct?
yes

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exam Other Question

During spring vacation in Florida it rained on 13 days, but when it rained in the morning the afternoon was fine, and every rainy afternoon was preceded by a fine morning.There wer Simplify:

square root of 15x^6 * the square root of 16x^5

I got the answer 4x^5 square root of 15x. Is this correct? Thanks so much!!