Answer:
Set a proportion
Step-by-step explanation: Remember in your lesson it taught how to set up a proportion and then cross multiply
Ok so you round 31 to 30 and 43 to 40 and then you multiply 30 by 40 and get 1200. 1200 is the same thing as 1200.00 bc you can take off the zeros after the decimal and it will be the same. Hope this helped and if your still confused you let me know I'll try to explain it more.
Answer:
97 cm
Step-by-step explanation:
Just add it up one by one