Step-by-step explanation:
a) 
b) 
c) 
Answer: Phone C
Using quick mental math, we can do 8% of 10 to get 0.8, which is close to the value of 0.0845*10. Also fairly quick is moving the decimal point over 1 spot to the right and we go from 0.0845 to 0.845 and that rounds to 0.8 when rounding to one decimal place. Recall that 8.45% = (8.45/100) = 0.0845
If you want to compute out the four results with a calculator, then it would look like this:
0.0845*20 = 1.69
0.0845*25 = 2.1125
0.0845*10 = 0.845
0.0845*18 = 1.521
and this shows that no other result (but choice C) is close to 0.8
So that's why the answer is choice C
It would take 5 hours for all the bacteria to die. 1000 divided by 5 is 200 so 200x5=1000
Answer: option a
Step-by-step explanation:
You must apply the formula for calculate the distance between the two points. which is shown below:
Therefore, keeping on mind that the points given in the problem are (6, 11), (0, 3), when you substitute values into the formula shown above, you obtain that the distance between these two points is the following:
Answer:
<h3>Children's books</h3>
- Number = c
- Cost of each = $5
- Total of children's books = 5c
<h3>Adult books</h3>
- Number = a
- Cost of each = $9
- Total of children's books = 9a
<h3>The equations reflecting the totals are</h3>
- Books ⇒ c + a = 500
- Total cost ⇒ 5c + 9a = 3940
