exam Maths Puzzle Numerical Ability

Hi, can I have some help with this problem?

A 10-ft-long stem of bamboo is broken in such a way that its tip touches the ground t = 3 ft from the base of the stem What is the height of the break? (Hint: Use the Pythagorean Theorem.)

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exam Other Question
$3.50, 5 times more nickels than dimes. a totalk of $10,000 is invested in two funds paying 5% and 7% annual interest. the combined annual interest is $644. how much of the 10,000 is invested in each fund?