Aplumber charges $45 for a service call, plus $70/h for her time. what is the length of a service call that cost $150? a. 0.5 h c. 2 h b. 1.5 h d. 2.5 h

Ameteorologist is studying the monthly rainfall in a section of the brazilian rainforest. she recorded the monthly rainfall, in inches, for last year. they were: 10.4, 10.3, 11.7, 11.1, 8.0, 4.4, 2.6, 1.8, 2.5, 4.4, 7.3, 9.5 fill in the missing values in the formula. what is the variance?