13. If BD LAC, m/DBE = (2x-1)", and m/CBE = (5x-42), find the value of x. B E

Find the unknown value. 27. y varies jointly with x and the cube root of 2. If when x=2 and z=27,y=12, find y if x=5 and z=8.

Find the intensity of light at a depth of 12 meter if I0=14 and k=0.7. Round to two decimals.

If a coffee filter is dropped, its velocity after t seconds is given by v(t)=4(10.0003t) feet per second. What is the terminal velocity, and how long does it take the filter to reach 99 of terminal velocity? Use a table increment of 0.1 and given your answer to the nearest tenth of a second.