Chord AB and CD in figure 7.22 intersect externally at Q. If AB=5cm, BQ=6cm, and DQ=4cm, calculate the length of chord CD.

Initially 100 milligrams of a radioactive substance was present. after 6 hours the mass had decreased by 4%. if the rate of decay is proportional to the amount of the substance present at time t, find the amount remaining after 24 hours. (round your answer to one decimal place.)

Rob spent 25%, percent more time on his research project than he had planned. he spent an extra h hours on the project. which of the following expressions could represent the number of hours rob actually spent on the project? two answers

The track team ran a mile and a quarter during their practice how many kilometers did her team runs?