Answer:
123.76
Step-by-step explanation:
a negative times a negative is a positive
22.1 times 5.6 is 123.76
Answer:
i) Boys:1200; Girls:2000
Boys:37.5%; Girls:62.5%
Step-by-step explanation:
i) Boys: 3200*(3/8) =1200
Girls: 3200-1200 =2000
ii) Boys: (1200/3200)*100%= 37.5%
Girls: 100%- 37.5%= 62.5%
Multiply the cost of an item or service by the sales tax in order to find out the total cost. The equation looks like this: Item or service cost x sales tax (in decimal form) = total sales tax. Add the total sales tax to the Item or service cost to get your total cost.
To solve this question we will use two important formulas.
The first formula involves the calculation of the decay constant, 
which is to be found as:
where 
is the half life of Pb-210 which is given to be 22 years in the question.
Thus, 
Now, we will use the second formula which is called the function of decay formula and is given as:
where 
percentage of Pb-210 remaining in the bone at present, which in our case is 67% or 0.67
percentage of Pb-210 to start with, which is always 100% or 1.
Plugging in all these values in the decay formula we are supposed to find the time, 
.
Taking natural log on both sides we get:
years
Therefore the bone fragment is about 12.71 years old.
Answer: Establish a national bank
Step-by-step explanation:
