Chase baked 4/5 dozen brownies in 3 hours ? What is her average of baking per hour ?

brownies per hour

Step-by-step explanation:

     Given parameters:

Number of brownies = of a dozen

Time taken  = 3hrs

Unknown:

Average baking per hour = ?

Solution:

The average baking per hour;

    This is a rate problem;

     Average baking per hour =

Number of brownies = x 12  =

 Average baking per hour =  

                                            =

                                             =

                                            = 3brownies per hour

- "runner b is moving at a slower rate."

- "the graphs shown are graphs of distance(km) against time(min).

the slopes of this graphs are are given by:

slope = (change in y)/(change in x)

= (change in distance)/(change in time)

this is the formula for finding the speed. so, the slope of these graphs represent the speed of the runner.

taking each division in the graph to represent 1 on both axis:

runner a ⇒ speed = (2-0)/(1-0)

= 2/1

= 2 km/min

runner b ⇒ speed = (3-0)/(3-0)

= 3/3

= 1 km/min

this shows that   runner b is moving at a slower rate."

hi! i think the answer is 1/2 : )