HELP PLS DUE TODAY I WILL GIVE BRAINLIEST (SHOW WORK PL TYYY)

1) Solve the proportion.
6/15=a/4

2) solve the two inequalities
1. 4k-1 ≥ -3
2. 4+x/2>2x

3) Solve each compound inequality
5m<-10 or 3m>9

4) solve each equation or inequality. If there is not solution, write no solution.
1. |y|=3
2. |5| ≤ 15

5) The ideal length of a certain nail is 20 mm. The actual length can vary from the ideal by at most 0.4 mm. Find the range of acceptable lengths of the nail.

You were told that the amount of time lapsed between consecutive trades on the new york stock exchange followed a normal distribution with a mean of 15 seconds. you were also told that the probability that the time lapsed between two consecutive trades to fall between 16 to 17 seconds was 13%. the probability that the time lapsed between two consecutive trades would fall below 13 seconds was 7%. what is the probability that the time lapsed between two consecutive trades will be between 14 and 15 seconds?

Which of the expressions (on the photo document i inserted) together represent all solutions to the following equation? 8cos(12x)+4=-4 *the answer should be in degrees.* > i would like for someone to explain the process to find the solutions for this.

The weight v of an object on venus varies directly with its weight e on earth. a person weighing 120 lb on earth would weigh 106 lb on venus. how much would a person weighing 150 lb on earth weigh on venus?