An average ant is 1/4 inch long. a picnic blanket is 72 inches long. how many ants long is the picnic blanket?

Given that (x-3) is a factor of f(x)=x^3+ax^2-x-6, find a and hence the number of real roots or the equation f(x)=0

Look at attachment. has all info needed. need

In triangle △abc, ∠abc=90°, bh is an altitude. find the missing lengths. ah=4 and hc=1, find bh.