Answer:
A
Step-by-step explanation:
is in the fourth quadrant where tan < 0
The related acute angle = 2π -
= 
Hence
tan(
)
= - tan(
)
= - 
= -
× 
= -
→ A
Answer:
22.1 grams
Step-by-step explanation:
At the end of each minute, (1 -17.1%) = 82.9% of the element remains. At the end of 19 minutes, the quantity has been multiplied by that value 19 times, so the remaining amount is ...
(780 g)(0.829^19) ≈ 22.1 g
After 19 minutes 22.1 grams remain.
Answer:
80
Step-by-step explanation:
It's supplementary to angle DAC.
The derivate is. f'(x)=2x+1 .then f'(-1)=-2+1=-1
Using the Pythagorean Theorem:
Missing side = √4^2 +8^2
Missing side = √16+64
Missing side = √80 = 8.9 (rounded to the nearest tenth)