Suppose a student is selected at random from 80 students where 30 are taking Mathematics, 20 are taking Chemistry, and 10 are taking mathematics and Chemistry. Find the probability that the
student is taking Mathematics or chemistry

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

Write the sine and cosine values of a, b, respectively, in the figure for (1) and (2) + explanation.

When steve woke up. his temperature was 102 degrees f. two hours later it was 3 degrees lower. what was his temperature then?