Aresearcher is interested in estimating the average salary of police officers in a large city. she wants to be 99% confident that her estimate is correct. if the standard deviation is $1050, how large a sample is needed to get the desired information and to be accurate within $200?

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.

Which shows one way to determine the factors of 4x3 + x2 – 8x – 2 by grouping?

According to the general equation for conditional probability if p(anb)=3/7 and p(b)=7/8 what is p(a i b)