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3 years ago

A right cylinder has a radius of 5 and height of 9. What is it’s surface area?

Mathematics

2 answers:

Art [367]3 years ago

8 0

Answer:140pi units 2 squared

Step-by-step explanation:

Snowcat [4.5K]3 years ago

6 0

Answer:

The surface area of the right cylinder is 140π cubic units or 439.60 cubic units.

Step-by-step explanation:

We have formula to find the surface area of a right cylinder.

Surface area = 2πr(h + r)

Given: r = 5 and h = 9,

Now plug in the value of r and h in the above formula, we get

Surface area = 2π.5 (9 + 5)

= 10π(14)

Surface area = 140π

The value of π = 3.14, when we plug in the value of π, we get

The surface area = 140 × 3.14

= 439.60 cubic units.

Therefore, the surface area of the right cylinder is 140π cubic units or 439.60 cubic units.

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-5 - (-7) + (-7) - 8=

Alisiya [41]

Answer:

-13:)

Step-by-step explanation:

Remove parentheses.

- 5 - (-7) - 7 - 8

Multiply -1 by -7

-5+ 7 - 7 -8

Add -5 and 7

2 - 7 - 8

Subtract 7 from 2

-5 - 8

Subtract 8 from -5

-13 :)

3 0

4 years ago

Use the Intermediate Value Theorem to show that there is a root of the given equation in the specified interval. ex = 3 − 2x, (0

raketka [301]

Answer:

$f(0)=-2\\f(1)=e-1$

Step-by-step explanation:

According to intermediate value theorem, if a function is continuous on an interval $[a,b]$ , and if $k$ is any number between $f(a)$ and $f(b)$ , then there exists a value, $x=m$ , where $a$ , such that $f(m)=k$

In the given question,

Intermediate Value Theorem is used to show that there is a root of the given equation in the specified interval.

Here,

$f(x)=e^x-3+2x$

Put $x=0$

$f(0)=e^0-3+2(0)=1-3+0=-2$

Put $x=1$

$f(1)=e^1-3+2(1)=e-3+2=e-1$

3 0

3 years ago

Solve the following system of equations please ASAP

swat32

Given:

The system of equation:

$x+y = -4$ -------- (1)

$y = x^{2} -6x$ --------- (2)

To find the values of x and y.

We will use substitution method.

From (1) we get,

$y = -4-x$

We will put the value of y in (1) and we get,

$-x-4 = x^{2} -6x$

or, $x^{2} -5x+4= 0$

Now we will apply middle term factor method.

$x^{2} -(4+1)x+4 = 0$

$x^{2} -4x-x +4 = 0$

$x(x-4)-1(x-4) = 0$

$(x-4)(x-1)= 0$

so, x = 4 and 1

Now,

Substitute x = 4 in (1) we get,

$y = -4-4 = -8$

And putting x = 1 in (1) we get,

$y = -4-1 = -5$

Hence, the solution of the given system of equation is (4,-8) and (1,-5)

Thus, Option A is the correct answer.

3 0

3 years ago

0.005 write as a fraction

kirill115 [55]

0.005 would be 5/1000 because how I know if it is 10ths or 100ths or 1000ths I count all the number on the right side of the decimal, hoped this could help!

5 0

4 years ago

Read 2 more answers

Find th slope of the line passing through the points (5,8) and (6,12)

nasty-shy [4]

Answer:

Slope= 4

Step-by-step explanation:

y2-y1/x2-x1

5=x1 8=y1 etc.

12-8/6-5

=4/1