you can estimate 57.8 and 81 then to check you can do 57.8 divided by 81
Hanna bought 85 candies and ate 20 of them. How many candies are left?
<span>circumference=pi * 2 radius=12pi, radius(small)=6;
</span>circumference=pi * 2 <span>radius=32pi, radius(small)=16;</span>
6:16=3:8
We let x be the length (in minutes) of a certain science class. 65% of this period is spent with the experiment which lasted for about 52 minutes. Mathematically, this can be expressed as,
52 = (0.65)(x)
The value of x from the generated equation is 80. Thus, the science class is 80 minutes long.
