Answer:
404. 17
Step-by-step explanation:
Plz mark as brainliest
Answer:
$47
Step-by-step explanation:
Create a system of equations where s is the cost of a shirt and t is the cost of a tie:
s + t = 64
s = t + 30
Solve by substitution by substituting (t + 30) into the first equation as s:
s + t = 64
(t + 30) + t = 64
Add like terms and solve for t:
2t + 30 = 64
2t = 34
t = 17
Then, plug in 17 as t into one of the equations to find s:
s = t + 30
s = 17 + 30
s = 47
So, the cost of the shirt is $47
Answer:
10
Step-by-step explanation:
The amount of drugs that will be left after 12 hours is 17.42 mg provided Sarah takes 550 mg of an antibiotic every hour.
<h3>What is exponential decay?</h3>
Exponential decay can be described as a reduced amount of an original substance by a definite percentage over a period of time. It can be determined by using the formula:

where;
- y = total amount,
- a = initial amount = 550 mg
- r = the growth rate = 0.25
- t = number of growth periods = 12 hours

y = 17.42 mg
Therefore, we can conclude that the amount of drugs that will be left after 12 hours is 17.42 mg.
Learn more about the exponential decay model here:
brainly.com/question/12940982