Answer:
300
Step-by-step explanation:
100*45= 4500
15000-4500=10500
10500/35=300
(:
Answer:
800 mL
Step-by-step explanation:
Let b represent the amount of solution B added to 2400 mL of solution A. The total amount of alcohol (mL) in the mixture is ...
10%×2400 + 50%×b = 20%×(2400 +b)
multiplying by 100 to get rid of the % signs and simplifying, we have ...
24000 +50b = 48000 +20b
30b = 24000 . . . . . . . . . subtract 24000+20b
b = 800 . . . . . . . . . . . . . . divide by 30
Debra added 800 mL of 50% alcohol to her 2400 mL of 10% alcohol to make a 20% solution.
Answer:
Step-by-step explanation:
For angle C,
cos(∠C) =
= 0.97
sin(∠C) =
= 0.26
tan(∠C) =
= 0.27
Therefore, from the triangle ABC,
cos(∠A) = cos(90° - ∠C)
= sin(∠C)
= 0.26
sin(∠A) = sin(90 - ∠A)
= cos(∠A)
= 0.97
tan(∠A) =
= 3.73
Angle

A 0.26 0.97 3.73
Answer: 
Step-by-step explanation:
since it's a cube the floor is in square shape
- area of one wall =
-
area of 4 walls = =
×
= 