exam Maths Puzzle Numerical Ability

Find the sum of 6s^4 and 4s^4.

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exam Other Question

Please help me solve the problem;

Find the measure of the acute angle that the line y=2/3x +2 makes with a horizontal line. Round the answer to the nearest tenth.

Appreciate your help. Thanks

Rupert bob invested $20,00, part at 14% and part at 13%. If the total interest at the end of the year is $2,720, how much did he invest at 14%?