Answer:
90
Step-by-step explanation:
Hi
perimeter of rectangle is : 2 length+2 width .
to progress in math, you must practice.
So , I let you do the first one which is the esaiest.
48 ) V147+ V147 + V108+V108 = 2V147 +2V108 = 2 ( V147+V108)
16.8-8.3=8.5
You round the numbers with decimals to their tenths place and then subtract normally.