book Maths Puzzle Numerical Ability

5*4a+6(5a+2)
Please help me figure this out.

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book Other Question

Please help. I need to find the surface area and volume of a sphere. I have a drawing of a sphere and 34in is written in the middle. Is this the radius or the diameter, can someone help me, I have been working on this problem for weeks. This year the sales for homegrown video are 35 % higher than last year. This year the sales are $ 182.250. What were the sales last year