Doug’s plumbing company charges $30 up front and $50 per hour while Penny’s plumbing company charges $192 up front and $176 per hour. Doug has decided to double both of his prices, and penny has decided to cut both of her prices in half. After how many hours of work would it be cheaper to hire penny?

Which of the following statement about pascal's triangle are true?

The annual snowfall in a town has a mean of 38 inches and a standard deviation of 10 inches. last year there were 63 inches of snow. find the number of standard deviations from the mean that is, rounded to two decimal places. 0.44 standard deviations below the mean 2.50 standard deviations below the mean 0.44 standard deviations above the mean 2.50 standard deviations above the mean

In the diagram, gef and hef are congruent. what is the value of x