The school yard is twice as long as it is wide. The width is 23 yards. How much fencing is needed to enclose the school yard?

If 1/√5+1/√5+1=p+q√r , find the values of p, q and r

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

Hundred and tens tables to make 430 in five different ways