In a school of 450 students, 110 of them are in the choir, 240 of them are in the band and 60 students are in the choir and the band. Please help I've been trying to solve this for an hour (T-T)

Marla bought a book for $12.95, a binder for $3.49, and a backpack for $44.99. the sales tax rate is 6%. find the amount of tax and the total she paid for these items

List x1, x2, x3, x4 where xi is the left endpoint of the four equal intervals used to estimate the area under the curve of f(x) between x = 4 and x = 6. a 4, 4.5, 5, 5.5 b 4.5, 5, 5.5, 6 c 4.25, 4.75, 5.25, 5.75 d 4, 4.2, 5.4, 6

Charlie tosses five coins.what is the probability that all five coins will land tails up.