Answer:
Part 15) Asia is
times greater than Africa
Part 16)
![\$469](https://img.qammunity.org/2020/formulas/mathematics/middle-school/wymt6urybia7zqwwziqrnyf8wk0xqjc3bc.png)
Part 17)
![\$3,060](https://img.qammunity.org/2020/formulas/mathematics/middle-school/ofh0ven81is58c6pkd6pmhkbhcaomeeacl.png)
Explanation:
Part 15)
Let
x------> Asia's area
y-----> Africa's area
we have
![x=17,200,000\ mi^(2)](https://img.qammunity.org/2020/formulas/mathematics/middle-school/nauy40cfswr3xck2fs551xpyiqiton3zsu.png)
![y=11,600,000\ mi^(2)](https://img.qammunity.org/2020/formulas/mathematics/middle-school/6pylsokg97t0lhxvc60wlb3jc63nlu8xi5.png)
Divide x by y
![(x)/(y) =(17,200,000)/(11,600,000)=(43)/(29)=(29)/(29)+(14)/(29)=1(14)/(29)](https://img.qammunity.org/2020/formulas/mathematics/middle-school/hum5fn1orit2bpnzbmk5ejx42q35fgj4xj.png)
therefore
Asia is
times greater than Africa
Part 16)
Let
x----> amount of money remained in the account
we know that
![x=\$1,679-(\$625+\$546+\$39)=\$469](https://img.qammunity.org/2020/formulas/mathematics/middle-school/67lfqic6eejqj9wng7u6i9wubtx46qzo6u.png)
Part 17)
step 1
Find the area of the hallway
![A=18*17=306\ ft^(2)](https://img.qammunity.org/2020/formulas/mathematics/middle-school/x5yrpnhsdfglahi8s46w5d3o2t5y1mhwn8.png)
step 2
To find the cost multiply the total area by
![10(\$)/(ft^(2))](https://img.qammunity.org/2020/formulas/mathematics/middle-school/g9b45wpknmy1y6rfj3zfpzfhd3dcysy4ic.png)
so
![306\ ft^(2)*10(\$)/(ft^(2))=\$3,060](https://img.qammunity.org/2020/formulas/mathematics/middle-school/232hcgvfhmr1i0bja7st7uxbbi5io6rq3s.png)