Ur answer is B- 4/5 because when u subtract them u get 0.8 and then u have to turn it as a fraction then it will be 8/10 then u simplify it and u get 4/5.
Hope u get it right!
To verify the identity we need the following identities:
i)

ii)

iii)

.
Also, we have know that

and

Thus,

By (ii) and (iii) we have:

by simplifying

and

Now,

is clearly -tanx.
Answer:
65 1/2 or 65.5
Step-by-step explanation:
3/2 = 1.5 or 1 1/2
PH can be calculated using the following equation
pH = -log [H₃O⁺]
for apple juice the hydronium /hydrogen ion concentration is 0.0003
pH = -log (0.0003)
pH = 3.5
correct answer is C
For ammonia
pH = -log (3.1 x 10⁻⁹)
pH = 8.5
answer should be 8.5