Let X = ml's of 3% hydrochloric acid and Y = ml's of 10% hydrochloric acid
Add X and Y to get the total milliliters:
X + Y = 175
Now multiply the quantities by their percentages go get the 6% required:
0.03x + 0.10y = 0.06(175)
Rewrite the first equation as x = 175 -y
Now replace x in the second equation and solve:
0.03(175-y) + 0.10y = 0.06(175)
Simplify:
5.25 - 0.03y + 0.10y = 10.5
Combine like terms:
5.25 +0.07y = 10.5
Subtract 5.25 from both sides:
0.07y = 5.25
Divide both sides by 0.07:
y = 5.25 / 0.07
y = 75
Now you have y solve for x:
x = 175-y = 175 - 75 = 100
You need 100 ml's of the 3% solution and 75 ml's of the 10% solution.
189=10x+99
x=amount of weeks
x=9 weeks
The important formula to this problem is
or
Now, the speed of the car is 70 km/h, and the speed of the truck is 50 km/h. It will take the two vehicles the same amount of time to meet since they both left at the same time. So, since distance equals rate times time, and t = time:
the distance of the car = 70t
the distance of the truck = 50t
Because they both left in opposite directions, and the towns are 420 kilometers apart, the equation for this would be
We now solve the equation.
It will take the vehicles 3 and a half hours to meet. Since we're looking for the time, 3 and a half hours from 10:00 AM is 1:30 PM.
So, the car and the truck will pass each other at 1:30 PM.
Answer:
254.5 Inches Cubed
Step-by-step explanation:
Formula for Finding the Volume of a Cylinder:
The radius is 3 inches.
The height is three times the radius.
Multiply the radius by three to get the height.
The height is 9 inches.
Use the formula to find the volume.
The exact volume is 81 inches cubed.
≈ 254.47
254.47 ≈ 254.5
The volume of the cylinder should be about 254.5 inches cubed.
Answer: um what
Step-by-step explanation: Wa