Pls help

find the value of x using the pythagorean theorem and its converse?

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.

A33 gram sample of a substance that's used to detect explosives has a k-value of 0.1473. n = noekt no = initial mass (at time t = 0) n = mass at time t k = a positive constant that depends on the substance itself and on the units used to measure time t = time, in days

65% of students in your school participate in at least one after school activity. if there are 980 students in you school, how many do not participate in an after school activity?