Estella surveyed some students at her school about their favorite classes of the students surveyed seven said science was their favorite class or seven of the students had other favorite classes what is the experimental probability that the next student Estella talks to pick science

This is about circle theorems. someone asap : (

Arectangular yard has area 96 square feet. if the width of the yard is 4 feet less than the length

The weibull distribution is widely used in statistical problems relating to aging of solid insulating materials subjected to aging and stress. use this distribution as a model for time (in hours) to failure of solid insulating specimens subjected to ac voltage. the values of the parameters depend on the voltage and temperature; suppose α = 2.5 and β = 190. (a) what is the probability that a specimen's lifetime is at most 250? less than 250? more than 300? (round your answers to four decimal places.) at most 250 less than 250 more than 300 (b) what is the probability that a specimen's lifetime is between 100 and 250? (round your answer to four decimal places.) (c) what value is such that exactly 50% of all specimens have lifetimes exceeding that value? (round your answer to three decimal places.) hr