Your proof is correct and very well done
The average cost in 1990 is <span>$12,841.</span>
Answer:
400 and 500
Step-by-step explanation:
the ratios are 8:10
total ratio = 8+10 = 18
share for the ratio is 8 = 8/18×900
= 0.444444444×900= 400
therefore, share for the ratio of 8= 400
share for the ratio of 10= 10/18×900
= 0.555555555×900=500
therefore, share for the ratio of 10= 500
C, since the radius is 10 multiply by 2 and 100 x 3.14 is 314