Answer:
D!!!
Step-by-step explanation:
you have to make a table to see that randy has run 3 miles.!!!
15% becomes 0.15
multiply it by 8700
0.15x8700=1305
To find the average, you have to add all the numbers up and then divide by the amount of numbers you added together.
Equation: (86+87+91+x)/4=98
Solve for x:
86+87+91+x=98*4
264+x=392
x=392-264
x=128
The fourth number is 128