How long would it take to swim across a lake that is 350 meters, if you swam at 9 m/sec

Explanation:

Time can be found by dividing the distance by the speed.

The distance is 350 meters.

The speed is 9 meters per second.

Substitute the values into the formula.

Divide. Note that the meters or "m" will cancel each other out and the seconds or "s" will move to the numerator.

Round to the nearest hundredth. The 8 in the thousandth place tells us to round the 8 to a 9.

It will take about 38.89 seconds to swim 350 meters at 9 meters per second.

half of a circle

explanation:

the arrow and the top of the circle is matching together. it is not a polygon because a polygon would always be the same shape. therefore, an half of a circle is called semicircle so you would find the radius of it.

prolly a beacuse the momentuem the car has increases while going down hill