Hello, need desperate here : (
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figure 1 shows 2 parallel lines l1: 2x+2y-1=0 and l2: 2x+2y-13=0

a) how do you find the distance between l1 and l2?
b) l3 is another line parallel to l1. if the distance between l1 and l3 is equal to that between l1 and l2, how do you find the equation of l3?

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.

Aswimming pool had 2.5 million liters of water in it. some water evaporated, and then the pool only had 22 million liters of water in it. what percent of the water evaporated?

In need of in the diagram, ∠abc is a right angle. ∠dbc = 30°27'40". find the measure of ∠abd.