When doing the diameter of a circle, using the circumference formula c=3.14*d do you spilt the diameter in half? ex. diameter is 6,and you change it to 3 and multiply it by 3.14

Lines p and q intersect. find the value of b. show your work. cite any theorems you use.

Phillip had some bricks. he stacked them in 6 equal piles. which expression shows the number of bricks phillip put in each pile? let the variable m stand for the unknown number of bricks. m + 6 m÷6    m−6    6m

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.)