A company found that an experienced surveyor can survey a roadbed in 7 hours. An apprentice surveyor needs 8 hours to survey the same stretch of road. If the two work together, find how long it takes them to complete the job.

Solve the equation -9p - 17 =10 a -3 b. 16 c. 18 d -16

F(x) = 1/x g(x)=x-4 can you evaluate (g*f)(0) ? why or why not?

Ur environment is very sensitive to the amount of ozone in the upper atmosphere. the level of ozone normally found is 4.04.0 parts/million (ppm). a researcher believes that the current ozone level is not at a normal level. the mean of 2525 samples is 4.44.4 ppm with a standard deviation of 0.80.8. assume the population is normally distributed. a level of significance of 0.020.02 will be used. make the decision to reject or fail to reject the null hypothesis. answer tables