Question

Округли с точностью до указанного в скобках разряда - 0,7038 ( 0,01 ) = , 158,36 ( 10 ) = , 13,804 ( 1 ) = , 71,983 ( 0,1 ) = . 2. в 8.30 в одном направлении из порта выехали две моторные лодки со скоростью соответственно 8 км/ч и 12 км/ч . в ... расстояние между лодками будет равно 10 км.

Answer 1

1) 0.70;
16;
14;
72.0;
2)12-8=4км
10÷4=2.5ч=2ч30мин
8.30+2.30=11ч

Answer 2

Calculations with Rounding

To perform the calculations with the specified level of precision, we'll round the given numbers to the indicated decimal places.

1. 0.7038 (0.01) = - Rounding 0.7038 to two decimal places gives us 0.70.

2. 158.36 (10) = - Rounding 158.36 to the nearest ten gives us 160.

3. 13.804 (1) = - Rounding 13.804 to the nearest whole number gives us 14.

4. 71.983 (0.1) = - Rounding 71.983 to one decimal place gives us 72.0.

Boat Speed and Distance Calculation

At 8:30, two motorboats set out from a port in the same direction. The first boat travels at a speed of 8 km/h, and the second boat travels at a speed of 12 km/h. We need to determine the distance between the boats after a certain time.

Let's denote: - Speed of the first boat as v1 = 8 km/h - Speed of the second boat as v2 = 12 km/h - Time passed as t hours - Distance covered by the first boat as d1 = v1 * t - Distance covered by the second boat as d2 = v2 * t

The distance between the boats after time t is given by the absolute difference between their distances: |d2 - d1| = |(v2 * t) - (v1 * t)| = |(v2 - v1) * t|

Given that the distance between the boats is 10 km, we can solve for t: |(12 - 8) * t| = 10 |4t| = 10 t = 10 / 4 t = 2.5 hours

Therefore, the distance between the boats will be 10 km after 2.5 hours.

Feel free to ask if you have further questions or need additional assistance!