Billy's dogs wouldn't stay in his yard, so his parents decided to build a rect- angular fence to keep them in. The fence was 5 yards long and
7 yards wide. What is the area of the part of the yard that is fenced
in?

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.)

Evaluate the expression for the given value of the variable. 5×(h+3) for h=7

If 2(a^2+b^2)=(a+b)^2 then, > a+b=0, > ab=0, > a=b, > 2a=b