exam Maths Puzzle Numerical Ability

Here is my word problem.

There are two companies that sell widgets. Both companies sell the widgets to the general public for the same price. In order to earn business, Company

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exam Other Question

(sqrt 6+ 2)^2
i got--- 14 sqrt6 is this right? I need help with these three questions. I cannot solve them. thank you.

If (theta) is an acute angle with cos(theta) = 1/9, find the exact value of sin a/2.

If (theta) is a