Answer:
surface area of the cylinder = 954.56inches
Step-by-step explanation:
given that
π = 3.14
height of the cylinder = 11in
radius of the cylinder = 8in
surface area of the cylinder = ?
recall that,
surface area of the cylinder = 2πrh + 2πr²
surface area of the cylinder = 2 x 3.14 x 11 x 8 + 2 x 3.14 x 8²
surface area of the cylinder = 552.64 + 6.28 x 64
surface area of the cylinder = 552.64 + 401.92
surface area of the cylinder = 954.56inches
Answer:
No Possible Triangles
Step-by-step explanation:
Answer:
15
Step-by-step explanation:
Given that the profit equation from selling x necklaces is
P = −x2 + 35x.
To make a profit of $300, the profit P = 300 then
300 = -x2 + 35x
x2 - 35x + 300 = 0
solve by factorization
x2 - 15x - 20x + 300 = 0
x(x - 15) - 20(x - 15) = 0
(x - 15)(x - 20) = 0
x - 15 = 0 or x - 20 = 0
x = 15 or 20
Since 20 is higher, the least number of her necklaces she must sell to make a profit of $300.00 is 15
Do you remember the special case of factoring the difference of 2 squares ?
x² - 5 = (x + √5) (x - √5)
That will be zero if either factor is zero.
First factor:
x + √5 = 0
<u>x = -√5</u>
Second factor:
x - √5 = 0
<u>x = √5</u>
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Another way to look at it is just to sit there and LOOK at it.
<u>x² - 5 = 0</u>
x² = 5
This is true if x = + or - √5 .