A mine produces 42.5 tons of coal per hour. How much coal will the mine produce in 12.5 hours?

Alarge rectangle is divided into four smaller rectangles.

(a) (8%) compute the probability of an even integer among the 100 integers 1! , 2! , 3! , until 100! (here n! is n factorial or n*(n-1)*(n-2) *… 1) (b) (16%) compute the probability of an even integer among the 100 integers: 1, 1+2, 1+2+3, 1+2+3+4, …., 1+2+3+… + 99, and 1+2+3+… + 100

How to use order of operation in 20 divide by 4 multiply 5 = 1