Answer:
Step-by-step explanation:
URGET!!! IM TAKING A TEST. DUE TODAY
1 answer:
Answer:
15x 345
x = number of hours she works
Step-by-step explanation:
First: find the inequality symbol
If she wants to earn at least 345, she wants to make 345 or more
that means you use the greater than or equal symbol ()
Next, if she makes 15 dollars an hour, x has to be the number of hours she works. The left side of the inequality would be $15* number of hours, or 15x
Thus, your inequality would be 15x 345
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Answer:
27.76 grams will be present in 500 years
Step-by-step explanation:
The given formula is , where A is the value of the substance in t years, and
is the initial value
∵ The half-life is a substance is 375 years
- Substitute A by and t by 375 to find the value of k
∴
- Divide both sides by
∴
- Insert ㏑ in both sides
∴ ㏑( ) = ㏑ (
)
- Remember ㏑ ( ) = n
∵ ㏑ ( ) = 375 k
∴ ㏑( ) = 375 k
- Divide both sides by 375
∴ k ≈ -0.00185
∴
∵ 70 grams is present now
- That means the initial value is 70 grams
∴ = 70
∵ The time is 500 years
∴ t = 500
- Substitute the values of and t in the formula
∵
∴ A = 27.76
∴ 27.76 grams will be present in 500 years
Note: Options are missing. So, the general solution of the given inequality is shown below.
Given:
The inequality is:
To find:
The point lies in the solution set of the given inequality.
Solution:
We have,
It can be written as:
All the points that satisfy the above inequality are in the solution set of the given inequality.
For example (0,0).
This statement is true. It means (0,0) is in the solution set.
For example (0,3).
This statement is false. It means (0,3) is not in the solution set.
The graph of the inequality is shown below.
All the points in the shaded region are in the solution set but the points on the boundary line are not in the solution set.
