exam Maths Puzzle Numerical Ability

Solve by using the quadratic formula. x^2 = 5x + 8

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exam Other Question

THE VOLUME OF A CYLINDRICAL TANK IS GIVEN BY THE FORMULA V=pie h r^2 WHERE h IS THE HEIGHT OF THE CYLINDER AND r IS ITS RADIUS. FIND THE VOLUME TO THE NEAREST TENTH OF A CUBIC FOOT OF A CYLINDRICAL TANK THAT HAS A RADIUS OF 3 FEET AND A HEIGHT OF 5 FEET. Use a special product to square the following binomial.
(2.5m - 0.4n)^2