Answer:
4 : 9
Step-by-step explanation:
Step 1: Find total amount of shapes
16 circles + 20 squares = 36 total shapes
Step 2: Write out ratio of circles to total shapes
16 : 36
Step 3: Simplify by dividing both numbers by 4
16/4 : 36/4
4 : 9
Answer:
21 years
Step-by-step explanation:
Use the equation 
where x is the number of years passed.
Once you've solved for it, x=20.475319. Although it's closer to 20 years to the nearest year, it's 21 years since you'll wont reach 3000 in year 20.
9.921 rounded to the nearest hundredth is 9.92.
The hundredth place is located at the two. Therefore, check the number to the right of the two (in this case 1). If this number is less than 5, you keep the number the same. If it is 5 or greater, you increase the number by one.
