2. A large firm collects sample data on the lengths of telephone calls (in minutes) made by employees in two different divisions, and the results are as follows. Sales Division Customer Service Division ni= 40 n2=20 Mean=10.26 Mean=6.93 Sı=8.65 S2=4.93 At 0.05 level of significance, test the claim that there is no difference between the mean times of all long-distance calls made in the two divisions. Assume that the population variances are equal.

It takes Doug 3 days to reroof a house. If Doug's son helps him, the job can be completed in 2 days. How long would it take Doug's son, working alone, to do the job?

Sum of the present ages of two friends are 23 years, five years ago the product of their ages was 42. Find their ages 5 years hence.

For​ exercise, Mae jogs 2 miles then walks an additional 4 miles. If her jogging speed is 4.5 miles per hour faster than her walking speed and her total exercise time is 3 ​hours, what is her walking​ speed?

Can you help me with a step by step solution to this word problem? One number exceeds another by 24.  The sum of two numbers is 58.  What are the numbers?   Thank you!

Could you write out the solution or make it more clear. I can't read the work when it is a jumble of numbers. Thank you.