A survey found that 70% of students do their homework before dinner. Out of 150 students, how many would you expect to do homework before dinner?

Afarm that has 4 x 10^2 acres has 1.2 x 10^5 cattle. what is the average number of cattle per acre? write the answer in scientific notation. answere asap

A33 gram sample of a substance that's used to detect explosives has a k-value of 0.1473. n = noekt no = initial mass (at time t = 0) n = mass at time t k = a positive constant that depends on the substance itself and on the units used to measure time t = time, in days

How many sides does a regular polygon have if each exterior angle measure is 45 degrees explain your answer, i really don't understand this.