2√20 and 4*5^1/2. Explanation Below:
---
When we simplify 2√20, we get 4√5, and 5^1/2 is √5. Therefore, 4*5^1/2 is 4√5.
---
Hope this helps!
Answer:
616 cm²
Step-by-step explanation:
To find the area of a circle you use the formula A = π · r²
So we know that the diameter is 28 cm, to find the radius we would divide this in half, because d = 2r, giving us 14. Now we can do 14² which is 196, and then times that by pi or in this case 22/7.
196 × (22/7) = 616
The answer is 2 hours so at 9am.
Explanation: 1 kilometer = 1000 meters so 1600 kilometers = 1600000 meters and 1600000 divided by 800000 equals 2.
Unbiased. If it was biased then she would only choose people she wanted to answer her survey. It is unbiased because she is asking the first 10 random people who walk into her shop.
Over a long period of time. Any given species has to reproduce multiple times and allow time for defects/deformations etc to happen so that the species can diversify itself. It takes years, decades, even centuries to notice genetic changes in species.