It was team color t-shirt day at Emily's school. The chart shows the number of students in her class and the color t-shirt that they wore. What percentage of the total students in Emily's class wore a black shirt? brainliest will be provided first come and its correct will be first served :)

The average human heart beats 1.15 \cdot 10^51.15⋅10 5 1, point, 15, dot, 10, start superscript, 5, end superscript times per day. there are 3.65 \cdot 10^23.65⋅10 2 3, point, 65, dot, 10, start superscript, 2, end superscript days in one year.how many times does the heart beat in one year? write your answer in scientific notation, and round to one decimal place.

Micheal is 4 times as old as brandon and is also 27 years older than brandon. how old is micheal

Abag contains 10 white golf balls and 6 striped golf balls. a golfer wants to add 112 golf balls to the bag. he wants the ratio of white to striped gold balls to remain the same. how many of each should he add?