What is the value of m in the figure below? if necessary round your answer to the nearest tenth of a unit

m=6.7

Step-by-step explanation:

It turns out from similar triangles, that 3/BD = BD / 12. Use triangles  ABD and BDC to show this relationship. Solving this equation will give you BD

BD² = 3*12

BD² = 36     Just leave it in this form. Do your rounding at the end.

Because triangle BDC is a right angle triangle, use the Pythagorean Theorem to solve for m

m² =  BD^2 + 3^2

m² = 36 + 9

m² = 45                        

Take the square root of both sides.

√m² =√45

m=6.7082039325

m=6.7

Thus the correct option is A

can you rephrase the question ? it is unclear : -)

step-by-step explanation:

it would take 7/10 of an hour too fill the pool.

step-by-step explanation: