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3 years ago

PLS HELP!! I NEED TO FIND THE SURFACE AREA OF THIS CYLINDER!!!!!

Mathematics

2 answers:

Mashutka [201]3 years ago

6 0

Answer:

The surface area of this cylinder is about 923.63 $inches^{2}$ .

Step-by-step explanation:

The formula for the surface area of a cylinder is this :

$A = 2\pi rh+2\pi r^{2}$

"R" is 7, and "h" is 14. Knowing these values, let's solve.

$A = 2\pi rh+2\pi r^{2}$ = 2 · π · 7 · 14 + 2 · π ·72 ≈ 923.62824

The surface area of this cylinder is about 923.63 $inches^{2}$ .

Hope this helps, please mark brainliest! :)

kap26 [50]3 years ago

3 0

Answer:

Step-by-step explanation:

you have two disks, and one rectangle

area of the disk = π $r^{2}$

47 π x 2 = 94 π (for the two disks....

rectangle area = L x W

width = 14

Length = 2*π*r = 14π

area = 14*14π = 196 π

total = 196 π + 94 π = 290 π

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Answer:

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3 years ago

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nlexa [21]

Answer:

8 is the length of JB

Step-by-step explanation:

<u>Key skills needed: Equations, Congruence</u>

1) We need to find out an equation to make based on the lengths that are given. ΔJMB is congruent to ΔKMB because of Side-Angle-Side:

JB is congruent to BK
Angle MBK would be a right angle, since it is supplementary to the right angle JBM. Since both are right angles they are congruent.
Both triangles have the side BM. Using the reflexive property, BM is congruent to itself, so there you go --> Side-Angle-Side

2) Now since both triangles are congruent, we can make the equation that the length of JM is congruent to the length of MK, using the fact that: If triangles are congruent, then corresponding parts are congruent.

3) This means that 16x -24 = 4x

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4 0

3 years ago

Write the expression in standard form. five divided by quantity three minus fifteen i.

EleoNora [17]

Standard form is a+bi where a and b are real numbers
remeber that i²=-1

ok

$\frac{5}{3-15i}$
we got to get the i out of the denomenator
remember the differnce of 2 perfect squares where (a-b)(a+b)=a²-b²

so multiply the whole thing by $\frac{3+15i}{3+15i}$
we get
$\frac{5(3+15i)}{3^2-(15i)^2}=\frac{15+75i}{9-225(-1)}=\frac{15+75i}{9+225}=$ $\frac{15+75i}{234}=\frac{15}{234}+\frac{75i}{234}=\frac{15}{234}+\frac{75}{234}i=\frac{5}{78}+\frac{25}{78}i$

in standard form, it is $\frac{5}{78}+\frac{25}{78}i$

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4 years ago

A researcher is using a two-tailed hypothesis test with α = .05 to evaluate the effect of a treatment. If the boundaries for the

Solnce55 [7]

Answer:

A. n = 22

Step-by-step explanation:

Hello!

The researcher conducted a one-sample t-tas with the following hypotheses:

H₀: μ = μ₀

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α:0.05

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The correct answer is a) n= 22

I hope this helps!

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3 years ago