Imagine taking a soup can and peeling off the label. This label fully covers the curve side. What comes off is a flat piece of paper. If no tears are made, you'll have a rectangle after its fully peeled off.
The rectangle will have a width of W = 50 (same as the height of the can) and a length of L = 2*pi*r (same as the circumference of the base). So the area of this rectangle is A = W*L = 50*2*pi*r = 100*pi*r
The expression 100*pi*r represents the lateral surface area for this particular cylinder
We are given that the lateral surface area is 750 square inches, so this is the area of the label that peels off meaning A = 750
Equate the two values and solve for r
100*pi*r = 750
pi*r =750/100
pi*r = 7.5
r = 7.5/pi
r = 7.5/3.14
r = 2.3885
which rounds to 2.39
This is why the answer is choice B) 2.39 inches
Look at your question and see if you can understand it because I can’t. I does not show how many Spanish Chinese and Russian, it just shows that languages and a whole bunch of numbers underneath, what number is Spanish, what number is Chinese, and Russian?
Answer: first you have to multiply 6 x 4 then you have k (24) then you do 24 + 6 and it equals 30!
Step-by-step explanation:
X+7y=0 (a)
2x-8y=22 (b)
1st write te 2 equation in terms of x
(a) x+7y=0 , then x= -7y
(b) 2x-8y=22 → 2x = 22 + 8y and x = 22/2 +8y/2 OR x = 11 + 4y
x = 11+4y and x = -7y Then 11 + 4y = -7y
Now we can extract the value of y:
11+4y = -7y
1st Add +7y to each side →11+4y+7y = -7y + 7y
11+ 11y = 0 . Now subtract 11 from both sides :→11+11y -11 = 0-11
11y = -11 and y = - 1
To find the value of x, replace the value of y (= - 1) in any of the given equation and you will find x = 7
Does this helped you?
Answer:
30
Step-by-step explanation:
Let's say x is the number of friends he has
4 · x = 121 - 1
4x = 120
Divide by 4 on each side
x = 30
