Which equation would best solve the following problem?
maria releases a javelin 1.5 meters above the ground with an initial vertical velocity of 22 meters per second. how long will it take the javelin to hit the ground?
–4.9t^2 + 22t + 1.5 = 0
–16t^2 + 22t + 1.5 = 0
–4.9t^2+ 22t = 1.5
–4.9t^2 + 1.5t + 22 = 0

What is the range of the data below? .8090100

Ijust need to see how to do this. so you don’t have to answer all of them just a step by step explanation of one.

2people are trying different phones to see which one has the better talk time. chatlong has an average of 18 hours with a standard deviation of 2 hours and talk-a-lot has an average of 20 hours with a standard deviation of 3. the two people who tested their phones both got 20 hours of use on their phones. for the z-scores i got 1 for the chatlong company and 0 for talk-a-lot. what is the percentile for each z-score?