Mrs. Taylor spent $420 on groceries for the week and paying bills. This is 30% of her income for the month. How much money does Mrs. Taylor earn per month? please help

For a read-a-thon, jay and odhràn each started reading a book at the same time and continued reading for several hours. jay's book had 278 pages, and he read 55 pages per hour. odhràn's book had 238 pages, and he read 45 pages per hour. after how many hours did they have the same number of pages left, and how many pages were left?

Can someone answer this question? : )

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