The answer is A (a mountain climber descending a mountain.
This sis the answer because it is the only option with a decrease. When something decreases, a negative value (a number) represents the amount it decreased.
Happy to help!
It is 30-60-90 triangle, so:

Answer B.
Bruh u don’t no this is easy
Answer:
2.00 grams
Step-by-step explanation:
1.66 + 0.34 = 2.00
2.00 grams
If we're talking in whole numbers, the only multiplication of whole numbers that equals two is
2 * 1
or
-2 * -1