Step-by-step explanation:
Transcribed image text: Spectra Analysis 7 100 80 60 40 20 150 50 STRUCTURE 60 40 20 0 180 160 140 120 100 8O
Answer:
52.7 g
Step-by-step explanation:
We are given;
- Initial mass of the element is 310 g
- Rate of decay 8.9% per minute
- Time for the decay 19 minutes
We are required to determine the amount of the element that will remain after 19 minutes.
We can use the formula;
New mass = Original mass × (1-r)^n
Where n is the time taken and r is the rate of decay.
Therefore;
Remaining mass = 310 g × (1-0.089)^19
= 52.748 g
= 52.7 g (to the nearest 10th)
Thus, the mass that will remain after 9 minutes will be 52.7 g
5.75 is the answer I just wanted to help but that like button
Answer:
12
Step-by-step explanation:
Because you add 8 to the 40 which is 48 then divide equaling 12
Answer: See bolded equations
Step-by-step explanation:
The system of equations can be used to solve this problem. C is child ticket and a is adult ticket.
Equation 1
3c+4a=1740
This equation comes from the cost of the tickets. 3c is the cost of $3 per child ticket and 4a is the cost of $4 per adult ticket. 1740 is the total amount collected.
Equation 2
c+a=530
This comes from the number of tickets sold. The c+a is the total of child and adult tickets sold and 530 is the total amount of tickets.