Target concentration = 20%.
Ratio of 12% and 30% alcohols needed
30-20 : 20-12 = 10:8 = 5:4
Volume of 12% = 72 mL * (5/(5+4)) = 40 mL
Volume of 30% = 72 mL *(4/(5+4)) = 32 mL
Total = 40+32 = 72 mL of 20%
First, you divide the 2 yard spool into 5 equal lengths, or perform the operation 2/5.
After completing this, you get that each length of ribbon is 0.4 yards. But the question asks for it in feet. (There are 3 feet in a yard) Therefore, we must multiply the number of yards by 3, to find this number in feet.
0.4*3= 1.2
Therefore, the 5 equal lengths of ribbon measure 1.2 feet.
You can't be a negative distance away from a person. Rule out C and D. to get the distance, you add the 2 numbers. 30+215 is 245. it is B.
<h3>
Answer: 1/9</h3>
Work Shown:
If the blue die shows a "2", then the red die must take on the values from the set {3, 4, 5, 6} in order for the sum of both dice to be larger than 4.
2+3 = 5
2+4 = 6
2+5 = 7
2+6 = 8
There are 6*6 = 36 total ways to roll two dice and exactly 4 ways to get the conditions stated above. The probability of getting a sum greater than 4 is 4/36 = 1/9.
Answer:
n = 30
Step-by-step explanation:
Given that,
The length of the ribbon is 4.5 m
Each piece is 15 cm long
We know that, 1 m = 100 cm
⇒ 4.5 m = 450 cm
Let there are n pieces. It can be calculated by dividing total length and each of each piece as follows :
There are 30 pieces.