Write an equation to represent : p
an electrician charges $40 to come to your house. she also charges $55 for each our that she works. the electrician charges you a total of $190. how many hours does the electrician work at your house? use h for the number of hours

Expresa commuter train leaves downtown sation and travels at a average speed of 55 miles per hour towards the north side sation, which is 50miles away. thirty minutes later, express commuter train #7 leaves north side and travels at a average speed of 35miles per hour towards downtown sation. at the moment the two trains pass each other, how far(in miles) is train #12 from the downtown sation and how long(in minutes) has the #12 train been traveling

An office supply company conducted a survey before marketing a new paper shredder designed for home use. in the survey, 80 % of the people who tried the shredder were satisfied with it. because of this high satisfaction rate, the company decided to market the new shredder. assume that 80 % of all people are satisfied with this shredder. during a certain month, 100 customers bought this shredder. find the probability that of these 100 customers, the number who are satisfied is 69 or fewer.

You estimate that a baby bird weighs 2 pounds. the actual weight of the baby bird is 1.5 pounds. find the percent error. round your answer to the nearest hundredth of a percent.