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2 years ago

Find the surface area of the cylinder. Round your answer to the nearest tenth.

Mathematics

2 answers:

Sindrei [870]2 years ago

4 0

Answer:

188.5ft²

Step-by-step explanation:

Surface area of cylinder = 2πrh+2πr²

=2π3*7+2π3²

=42π+18π

=60π=188.495559215≈188.5ft²

Molodets [167]2 years ago

3 0

Answer:

188.5 ft²

Step-by-step explanation:

2πr(r+h)

=2*22/7*3(3+7)

=(44*3*10)/7=1320/7=188.5

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Please help problems below!!!

Delvig [45]

Answer:

#16 has the greatest y - intercept,

Step-by-step explanation:

the y - intercept is the number that comes after x in y = ?x + ?

The equation is y = mx + b, where m is the slope and b is the y - intercept.

#13 has a y - intercept of 5, #14 has 0, #15 is 2, and #16 is 6

The y - intercept is the value of y when x is 0, or where the line is on the y -axis

6 0

2 years ago

Jazziel bought a smart phone 5 years ago for $90. His sister paid 30% more for the same model. Show your work in the space provi

Ratling [72]

Answer:

Step-by-step explanation:

90/3=30

3 0

3 years ago

3.4=21 2.5=7. 4.4=؟

Licemer1 [7]

Answer:

Step-by-step explanation:

From the given values

The possible logic could be

if x.y is given

then it is equal to $=\frac{(x+y)\times x}{y-3}$

For 1st example

3.4 $=\frac{(3+4) \times 3}{4-3} =\frac{21}{1} =21$

For 2nd example

2.5 $=\frac{(2+5) \times 2}{5-3} =\frac{7 \times 2}{2} =7$

⇒4.4 $=\frac{(4+4)\times 4}{4-3} =32$

4 0

3 years ago

Allen drove 90 miles in 2 and 1/4 hours at a constand speed, how many miles did he drive in one hour.

Bumek [7]

Use property of proportion:

miles time (hs)
90 2.25
x 1

x = 90 ÷ 2.25
x = 40 miles

8 0

2 years ago

Please prove this........

Crazy boy [7]

Answer: see proof below

<u>Step-by-step explanation:</u>

Given: A + B + C = π → C = π - (A + B)

→ sin C = sin(π - (A + B)) cos C = sin(π - (A + B))

→ sin C = sin (A + B) cos C = - cos(A + B)

Use the following Sum to Product Identity:

sin A + sin B = 2 cos[(A + B)/2] · sin [(A - B)/2]

cos A + cos B = 2 cos[(A + B)/2] · cos [(A - B)/2]

Use the following Double Angle Identity:

sin 2A = 2 sin A · cos A

<u>Proof LHS → RHS</u>

LHS: (sin 2A + sin 2B) + sin 2C

$\text{Sum to Product:}\qquad 2\sin\bigg(\dfrac{2A+2B}{2}\bigg)\cdot \cos \bigg(\dfrac{2A - 2B}{2}\bigg)-\sin 2C$

$\text{Double Angle:}\qquad 2\sin\bigg(\dfrac{2A+2B}{2}\bigg)\cdot \cos \bigg(\dfrac{2A - 2B}{2}\bigg)-2\sin C\cdot \cos C$

$\text{Simplify:}\qquad \qquad 2\sin (A + B)\cdot \cos (A - B)-2\sin C\cdot \cos C$

$\text{Given:}\qquad \qquad \quad 2\sin C\cdot \cos (A - B)+2\sin C\cdot \cos (A+B)$

$\text{Factor:}\qquad \qquad \qquad 2\sin C\cdot [\cos (A-B)+\cos (A+B)]$

$\text{Sum to Product:}\qquad 2\sin C\cdot 2\cos A\cdot \cos B$

$\text{Simplify:}\qquad \qquad 4\cos A\cdot \cos B \cdot \sin C$

LHS = RHS: 4 cos A · cos B · sin C = 4 cos A · cos B · sin C $\checkmark$

7 0

3 years ago