exam Maths Puzzle Numerical Ability

Find the distance between (-3,-2) and (1,4), simplify form

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exam Other Question

please solve this problem: please solve the trigonometric equation sin2theta=square root of 3/2, give positive values of the angle between 0 to 360 degress give any approximate val 2 is what percent of 2.5?

Is this correct?
2/100= 0.02
0.02*2.5=0.05
0.05*100=5