Answer:
The integer that shows the change in the number of toy cars Bader has is <u>-24.</u>
Explanation:
Think of it like a math problem, when you take away from your own amount, (in this case, his cars) you're subtracting from the original amount of things you had. The symbol for subtraction is also "-", so with that information it's a bit self explanatory to know which answer is correct.
Answer: The sample size would be needed = 385
Step-by-step explanation:
Let p be the prior population proportion.
Margin of error = E
When not estimate of p is given , the formula to calculate the minimum sample size <em>n</em> = , where z* = critical value for given confidence interval.
Here z* for 95% confidence level is 1.96.
E=5%=0.05
Then
Hence, the sample size would be needed = 385
(1) r+y<=15
<span>r>=5 </span>
<span>8r+12y>=120 </span>
<span>(3) assuming she will work 15 hours, y = 15-r </span>
<span>so </span>
<span>8r + 12(15-r) >= 120 </span>
<span>8r+180-12r>=120 </span>
<span>-4r+180>=120 </span>
<span>-4r >= -60 </span>
<span>r <= 15 </span>
<span>looks like she could work all 15 hours and still make 120 dollars </span>
<span>(4) r= 5 required hours in the restaurant then </span>
<span>8r + 12(15-r)= 160</span>
Is it multiplication? subtraction? division? addition?