Answer:
A. 251.2cm2
Step-by-step explanation:
Given radius of the cylinder 'r' = 2 cm
Given Height of the cylinder 'h' = 20 cm
Area of the curved surface = 2 π r h
The plastic coating would be needed to coat the surface of the chain link
A = 2 π r h
A = 2 × 3.14 ×2×20
A = 251.2 cm²
Conclusion:-
The plastic coating would be needed to coat the surface of the chain link
= 251.2 cm²
Answer: 35
Step-by-step explanation:
Given : At Deb’s Deli, a customer may choose either a sandwich and a salad or a sandwich and a soup for the lunch special.
The number of choices for sandwiches = 5
The number of choices for salad = 4
The number of choices for soup = 3
Now, the number of possible lunch special combinations can be ordered will be :-
Hence, the number of possible lunch special combinations can be ordered will be 35.
5300 liters x .26 liter/gallon = 1378 gallons. This is what you need to hold in gallons
<span>Then 1378 gallons/ 60 gallons/drum= 22.96 drums. </span>
<span>Since each can only hold 60 gallons maximum you round up to 23 drums
hope this helped!!</span>
Answer:
Hours Charge
1 y = 6.5(1) + 5 = $11.5
2 y = 6.5(2) + 5 = $18
3 y = 6.5(3) + 5 = $24.5
4 y = 6.5(4) + 5 = $31
Step-by-step explanation:
In an equation y=mx+b, we can interpret the intercept b as the value of the initial charge and the slope m as the additional charge per hour. So, we can formulate the following equation:
y = 6.5x + 5
Where x is the hours and y are the charges for the babysitting, so, we can fill the table as:
Hours Charge
1 y = 6.5(1) + 5 = $11.5
2 y = 6.5(2) + 5 = $18
3 y = 6.5(3) + 5 = $24.5
4 y = 6.5(4) + 5 = $31
Answer:
3.85 hours
Step-by-step explanation:
We have that the model equation in this case would be of the following type, being "and" the concentration of bacteria:
y = a * e ^ (b * t)
where a and b are constants and t is time.
We know that when the time is 0, we know that there are 100,000 bacteria, therefore:
100000 = a * e ^ (b * 0)
100000 = a * 1
a = 100000
they tell us that when the time is 2 hours, the amount doubles, that is:
200000 = a * e ^ (b * 2)
already knowing that a equals 100,000
e ^ (b * 2) = 2
b * 2 = ln 2
b = (ln 2) / 2
b = 0.3465
Having the value of the constants, we will calculate the value of the time when there are 380000, that is:
380000 = 100000 * (e ^ 0.3465 * t)
3.8 = e ^ 0.3465 * t
ln 3.8 = 0.3465 * t
t = 1.335 / 0.3465
t = 3.85
That is to say that in order to reach this concentration 3.85 hours must pass
