Girls drop yall ig (preferably yall chocolate goddesses)

Two sides of a triangle mesure 20cm and 30cm. what is the measure of the third side

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.

1mile equals approximately 1.6 kilometers. which best approximates the number of miles in 6 kilometers?