The average weight of a mature human brain is approximately 1400 grams. what is the equivalent weight in kilograms? in pounds?

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 $740 is invested at an interest rate of 11% per year and is compounded continuously, how much will the investment be worth in 7 years? use the continuous compound interest formula a = pert.

Ab and bc are tangent to circle d. find x is ab = 3x + 8 and bc = 26. find x