20х^3-8х^2+4 при х= -0,1

для ремонта двух книг Косте нужно 3 ч. Сколько времени нужно для ремонта 4 книг ? 6 книг ? c книг?

Bob......(play) football in the park at 10 am this morning. Mark......(send) e-mails until 11 pm last night. Tom ..........(recover) in hospital for two weeks after his fall. Jane ....(read) the newspaper when the phone rang. Tom ......(watch) TV when Jane arrived. --PAST SIMPLE OR PAST CONTINUOUS? PUT THE VERBS.

Найти сумму всех цифр числа 21212324...6970?