Abby gets paid $15 per hour for babysitting. She worked 3.5 hours on Firday night & 5.75 hours on Saturday night. How much money did she make for the entire weekend? A. $52.50
B. $301.88
C. $138.75
D. $86.25

An automated water dispenser fills packets with one liter of water on average, with a standard deviation of 5 milliliter. the manual says that after a year of operation the dispenser should be tested to see if it needs recalibration. a year later a number of filled packets are set aside and measured separately. it is found that the average packet now contains about 0.995 liters. does the dispenser need calibration? explain your answer.

∆red ≅ ∆ by rule will give brainiest if possible

When you have 25 numbers, and jake picks 3 random numbers and puts them back, what is the chance bob has of picking those 3 numbers when he picks 6 random numbers (without putting them back)? explain.