11. An astronaut who weighs 180 lb on Earth weighs only 9 lb on Mars. How much would a person who weighs 13 lb on Mars weigh on Earth?
I also need fraction work

An energy drink company claims that its product increases students' memory levels. to support its claims, the company issues advertisements claiming that 8 out of 10 people (chosen randomly from across the country) who tried their product reported improved memory. the missing component in this study is a .

98 point question what is the record for most points in one

Charlie is at an amusement park that has 18 different rides. each ride costs $1.75. the function c(r) = 1.75r represents the total amount of money that charlie will spend if he goes on r rides, but he never goes on the same one more than once. what domain and range are reasonable for the function?