PLZ HHELP MMEEE ok so i kinda got some of it bu could you help me with the rest

oh and wht do i shade and which ones do i connect

For one history test, keith had to answer 40 questions. of these 40 questions, keith answered 28 of them correctly. what percent did keith get on his history test? round your answer to the nearest tenth if necessary

If eh = hg and hg=16, find the diameter of k

Pls if a cow has a mass of 9×10^2 kilograms, and a blue whale has a mass of 1.8×10^5 kilograms, which of these statements is true?