Element X decays radioactively with half life of 11 minutes. If there are 790 grams of element X, how long, to the nearest tenth of a minute, would it take the element to decay to 40 grams

14 pointslet x be the seats in the small van and y the seats in the large van. how many seats does the large van have? a company uses two vans to transport worker from a free parking lot to the workplace between 7: 00 and 9: 00a.m. one van has 9 more seats than the other. the smaller van makes two trips every morning while the larger one makes only one trip. the two vans can transport 69 people, maximum.how many seats does the larger van have?

An angle that measures between 90 and 180° is called a(,

If f(x)=3x+1 and f^-1=x-1/3, then f^-1(7)=