Answer:

Step-by-step explanation:
Product of of 3 and b is 3b
At least means greater than or equal too.

Sqrt(-2), can be written as i * sqrt(2). Thus, our answer is x - i sqrt(2).
Answer:
25% of 80 is D. 20kg
Step-by-step explanation:
50% of 80 is 40 and we know that 25% is half of 50%, so half of 40 would be 20.
So, the answer is D. 20kg
Hope this helps! :)
So 2.5 os to 50, aka 2.5:50
divide each side by 2.5 to get the answer.
if you dont have a calculator, divide each side by 5 to get .5:10, multiply by 2 to get 1:20