A car travels 72km in an hour. Find its speed in metres per second.

20 m/s

Step-by-step explanation:

=> 72 km/hr

In changing the speed from km/hr to m/s, we multiply by

So,

=> 72 ×

=> 2 × 10

=> 20 m/s

600,000,000,000, or 6e14

step-by-step explanation:

answer: 33 ( approx)

step-by-step explanation:

since, in the linear regression formula, the slope is the a in the equation y = b + ax ( by comparing it with the general equation of line y = mx + c )

where,

here given table is,

price ($), x   :           18         23       25       29       30       33

pairs sold, y :         16         13         10       8         6       2

so, ,   ,   ,

and   ,

thus, slop of the given line is,

⇒  

⇒   ≈ 33