Перевести градусную меру в радианную 30 градусов 10 минут

Решим с точностью до четвёртого десятичного знака умножим 30 на  пи / 180 умножим 10 на  пи / (180*60) находим рад.

Что то типо этого: i live in a comfortable city flat in a 9-stored block of flats not far from the centre of samara. it is not a very green place, but still there are many trees around the house and in summer the yard looks very beautiful and cozy. the house is located comfortably because there a few supermarkets, pharmacies around and a cinema.my flat is on the fourth floor. it’s very comfortable and well-planned. there are three rooms, a kitchen, a bathroom and a balcony overlooking the yard.we have all modern conveniences, such as central heating, electricity, cold and hot running water and a telephone. the largest room in our flat is the living room. my family uses it as a sitting room. there is a sofa, two armchairs, a small glass coffee table, a tv set on the wall and a dvd player in it. we use this room to meet the guests and to celebrate all holidays and important family occasions.two other rooms are a bedroom of my parents and my bedroom. my room is rather small but it is very cozy. i like it so much, because this is my own place, my own corner.i have all the things that i need there – a soft bed at the right corner, a table near the window with a computer and a wardrobe near the wall.our kitchen is not very large but it’s light. it’s very well-equipped. we have got a refrigerator, a microwave oven, an electric teapot, a coffee maker and a toaster and a lot of other household stuff. my mum likes cooking very much and in the evenings my family likes having dinner together in the kitchen – it’s our family tradition

13 - 7 =   6 м. на столько один рулон больше другого.                                               138 : 6 =23р. стоит один метр клеенки.                                                                   23 х 7 =161 р. заплатили за один рулон.                                                                   23 х 13 =299 р.  заплатили за второй рулон.                                                           ответ : 161 стоимость одного рулона, 299 р. стоимость второго.