Given that amount of first acid solution = 4 liters
Let concentration of the first acid solution = x
then effective amount of first solution = 4x
Given that amount of second acid solution = 10 liters
Givn that concentration of the second acid solution = 40% = 0.4
then effective amount of second solution = 0.4(10)
Then amount of resulting acid solution = (4+10) liters
Givn that concentration of the resulting acid solution = 30% = 0.3
then effective amount of resulting solution = 0.3(4+10)
Combining all those results gives equation
4x +0.4(10) = 0.3(4+10)
4x +4 = 0.3(14)
4x +4 = 4.2
4x = 0.2
x=0.05
Hence final answer is 0.05 or you can say 5%.
Answer:
V = 23.85 ft³
Step-by-step explanation:
The dimension of the square base = x ft by x ft
Height of box = y
Volume of the box, 
Cost of top = $4 * 
Cost of the bottom = $9 * 
Cost of the sides = $3 * 4xy
Total cost = 4x² + 9x² + 12xy
Total cost = 13x² + 12xy
Total cost = $193
193 = 13x² + 12xy

But volume, V = x²y
V = 
V =
...................(1)
At maximum value, V' = 0
0 = 

x = 2.23
Put the value of x into (1)

V = 23.85 ft³
Answer:
-27
Step-by-step explanation:
-3*-3=9 and then 9*-3 = -27
Answer:
V=349525.333*pi
Step-by-step explanation:
Volume of a sphere: V=(4/3)*pi*r^3 where r=radius.
r=64
V=(4/3)*pi*(64)^3=(4/3)(262144)pi=349525.333*pi
Answer:
D.
Step-by-step explanation:
The length of the unmarked side of the triangle is found by using Pythagoras:
x sqrt (10^2 - 6^2)
= sqrt 64
= 8.
The length of the curved part = 1/2 * pi * 10 = 5pi
Perimeter = 8 + 6 + 5pi
= 14 + 5pi