Suppose that the weights of 5400 registered female labrador retrievers in the u. s. are distributed normally with a mean of 62.5 lb and a standard deviation of 2.5 lb approximately how many of the labradors retrievers weigh less than 62.5 lb?

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.

Simplify using positive exponents only.

Each unit cost 14p, how much would 942 units cost?