Which equation can be used to find 42 x 51? (4 x 5) + (2x1) = 20 + 2
(4 x 5) +(4 x 1) + (2 X 5) + (2x1) = 20 +4 +10 + 2
(40 x 50) + (40 x 1) + (2 X 50) + (2 X 1) = 2,000 + 40 + 100 + 2
(40 x 50) + 2x1) = 2,000 + 2
Done-

According to statistics a person will devote 32 years to sleeping and watching tv. the number of years sleeping will exceed the number of years watching tv by 18. over a lifetime, how many years will the person spend on each of these activities

Successful implementation of a new system is based on three independent modules. module 1 works properly with probability 0.96. for modules 2 and 3, these probabilities equal 0.95 and 0.90. compute the probability that at least one of these three modules fails to work properly.

Yesterday i ran 5 miles. today, i ran 3.7 miles. did my percent increase, decrease or is it a percent error? plz i need