If a student is chosen at random, what is the probability of choosing a boy OR a student without an A? * 4 points

0.80
0.37
0.09
0.89

What is the measure of x, in degrees

Simplify the expression 10/11(22z) + (a+5) -1

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