Why when on overall it says i have 40 brainliests, on my profile it says i only have 22 meanwhile last week it said i had 37, i worked really hard for those brainliests I want an answer. >:(

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

Evaluate-27 ^4/3/8 a) - 81/16 b) 81/16 c) 16/81

You can ride your bike around your block 6 times and the whole neighborhood 5 times in 16 minutes. you can ride your bike around your block 3 times and the whole neighborhood 10 times in 23 minutes. how long does it take you to ride around the neighborhood?