So the numbers on the credit card can start with any single-digit number
So it could start with;
0
1
2
3
4
5
6
7
8
Or 9
We are looking for the odds of it starting with a 7
There is only one 7, so the numerator is 1
There are then nine other possible numbers it could be, and counting the number 7, there is a total of ten different possibilities, so 10 is the denominator
So the odds of the card starting with a 7 is
1/10
He could use a $10 & $1 bill! This would leave him with only having to get $0.49 in change.
Total length of the string = yard
Length of string used for craft = of total length of string
= of
=
= yard
Length of the string left after use = Total length of the string - Length of string used for craft
Length of the string left after use =
=
Reducing it to the lowest term, we get
= yard
Therefore, the length of string left is yard.
Answer:
b²
Step-by-step explanation:
To complete the square
add ( half the coefficient of the x- term)² to x² + bx
x² + 2( b )x + ( b )²
= x² + bx + b²
Answer:
48 µg of the complex should be added when a drug company is making a 6 kg batch of vitamins.
Step-by-step explanation:
Given : The concentration of Vitamin B complex in a certain vitamin mixture is 8 ppb.
To find : How many µg of the complex should be added when a drug company is making a 6 kg batch of vitamins?
Solution :
The formula used to find the mass is given by,
ppb denotes parts per billion.
We have given, concentration of vitamin B complex is 8 ppb.
Mass of solution is 6 kg =
(As )
Substitute in the formula,
Therefore, 48 µg of the complex should be added when a drug company is making a 6 kg batch of vitamins.