Jack runs at an average speed of 4 miles for one hour. he then cycles 6 miles at 12 miles per hour. find his average speed for the whole journey.

He ran 4 miles per hour for one hour, which means he ran 4 miles.

He cycled 6 miles at 12 miles per hour, which means he cycled for one half an hour.

His total miles was 4 + 6 = 10 total miles.

His total time was 1 hour +  one half an hour = 1.5 hours.

His average speed is total distance divided by total time:

10 / 1.5 = 6 2/3 miles per hour.

area of part 1:

a1=base*height/2=(8+2)*(8-2-2-1)/2=10*3/2=15 ft^2

area of part 2:

a2=length*width=(8+2)*1=10 ft2

area of part 3:

a3=length*width=8*2=16 ft2

total shaded area : a1+a2+a3=41 ft2

total area of the reactangle : a=16*8=128 ft2

total area of the nonshaded region : 128-41=87 ft2

step-by-step explanation:

the options are kind of confusing. i can tell you what i see going on here when i look at the graph.

the class and exam medians are closely related, and it looks like the low outlier on the exam did pull the median lower. [tex][/tex]