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SCORPION-xisa [38]
4 years ago
6

Find the surface area of a cylinder with a base diameter of 4 ft and a height of 5 ft.

Mathematics
1 answer:
Vladimir [108]4 years ago
6 0

Answer:

28π

Step-by-step explanation:

A =2πrh+2πr^{2}

r= \frac{4}{2} ft = 2

h= 5ft

A = 2π (2* 5 )+ 2π(2*2)

A= 2π (10)+2π (4)

A= 20π + 8π  

= 28π

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Which of the following equations describes the line shown below? Check all<br> that apply.
scoundrel [369]

Answer:

B. y = 2x - 2

E. y + 4 = 2(x + 1)

F. y - 6 = 2(x - 4)

Step-by-step explanation:

The equation of the line can be found using either the point-slope equation or the slope-intercept equation.

✔️Equation of the line in point-slope using the slope and the coordinates of the point (4, 6):

Slope = m = change in y/change in x

Using (4, 6) and (-1, -4),

m = (-4 - 6)/(-1 - 4)

m = -10/-5

m = 2

Substitute m = 2, and (a, b) = (4, 6) into the point-slope equation form y - b = m(x - a)

Thus:

y - 6 = 2(x - 4)

✔️Equation of the line in point-slope using the slope and the coordinates of the point (-1, -4):

Slope = m = 2

Substitute m = 2, and (a, b) = (-1, -4) into the point-slope equation form y - b = m(x - a)

Thus:

y - (-4) = 2(x - (-1))

y + 4 = 2(x + 1)

✔️Equation of the line in slope-intercept form, y = mx + b

Where,

m = slope = 2

b = y-intercept = -2 (the point where the line intercepts the y-axis)

Thus, substitute m = 2 and b = -2 into y = mx + b

y = 2x + (-2)

y = 2x - 2

6 0
3 years ago
The axis of symmetry for the graph of the function f start bracket x end bracket equals one-quarter x square plus b x plus 10 is
zimovet [89]

The value of b is -3.

<h3>What is axis of symmetry?</h3>

Axis of symmetry is a line that divides an object into two halves,thereby creation a mirror like reflection of either side of the object.

Now the given function is,

f(x) = 1/4 x^2 bx + 10

and axis of symmetry is at x = 6

Now the quadratic function in standard form is given as,

f(x) = a x^2 bx + c

By comprison we get,

a = 1/4

c = 10

Since axis of symmetry is a vertical line

x = -b/2a

Therefore,

6 = -b/2*(1/4)

-b = 6*2*(1/4)

or, b = -12/4

or, b = -3

Hence,The value of b is -3.

More about axis of symmetry :

brainly.com/question/3514150

#SPJ1

3 0
2 years ago
the price of an item has been reduced by 40% the original price was $15 what is the price of the item now​
harkovskaia [24]
This answer would be 21 because you’d just do 15 increased by 40% which gave me 21
3 0
3 years ago
1.On which number line are –4 and its opposite shown?2.Which of the following describes the location of the opposite of the numb
anzhelika [568]

Answer:

1. d

2. 2

Step-by-step explanation:

if it's a negative it's opposite will be a positive and vice versa

8 0
3 years ago
Mt. Everest, the highest elevation in Asia, is 29,028 feet above sea level. The Dead Sea, the lowest elevation, is 1,312 feet be
klasskru [66]
29,028 - 1312 = 27716 is the difference between elevations .

7 0
3 years ago
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