All categories

2 years ago

Find the surface area of the cone in terms of pi. 15cm 3cm

Mathematics

1 answer:

fgiga [73]2 years ago

3 0

Answer:

SA = 54π cm^2

Step-by-step explanation:

${\pi}rs + {\pi} {r}^{2}$

radius = 3cm

slant height = 15 cm

follow the formula

You might be interested in

Solve x2 + 2x = 4 for x by completing the square. x equals plus or minus square root of 5 plus 1 x equals plus or minus square r

steposvetlana [31]

Answer:

x equals plus or minus square root of 5 minus 1

Step-by-step explanation:

we have

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

Divide by 2 the coefficient of the x-term

$2/2=1$

squared the number

$1^2=1$

Adds both sides

$x^{2} +2x+1=4+1$

$x^{2} +2x+1=5$

Rewrite as perfect squares

$(x+1)^{2}=5$

take the square root both sides

$x+1=(+/-)\sqrt{5}$

$x=(+/-)\sqrt{5}-1$

therefore

x equals plus or minus square root of 5 minus 1

4 0

3 years ago

A beam of light from a monochromatic laser shines into a piece of glass. The glass has thickness L and index of refraction n=1.5

boyakko [2]

Additional information to complete the question:

How long does it take for a short pulse of light to travel from one end of the glass to the other?

Express your answer in terms of some or all of the variables f and L. Use the numeric value given for n in the introduction.

T = ___________ s

Answer:

$T = \frac{15}{f}$

Step-by-step explanation:

Given:

Thickness og glass = L

Index of refraction n=1.5

Frequency = f

$Wavelength = \frac{L}{10}$

λ(air) $= \frac{L}{10}$

λ(glass) = λ(air) / n

= $\frac{\frac{L}{10}}{1.5}$

= $\frac{L}{10} * \frac{1}{1.5}$

= $\frac{L}{15}$

V(glass) = fλ(glass)

$= f * \frac{L}{15}$

$T = \frac{L}{V_{glass}} = \frac{15}{f}$

7 0

3 years ago

The radius of a circle is 16 cm. Find its area in terms of \piπ

Kitty [74]

Answer256pi

Step-by-step explanation:

Area=pi*r^2

=pi*16^2

256pi

3 0

2 years ago

I am half way between two consecutive numbers. The product of the two numbers is 650. what number am I ?

elena-14-01-66 [18.8K]

Answer: 325

650/2=325

6 0

3 years ago

If log a=3 log b-2 log c, find an expression for a that does not involve logarithms

photoshop1234 [79]

Assuming that b>0 and c>0:

log(a)=3×log(b)-2×log(c)=

log(b³)-log(c²)=

log(b³/c²)

Hence a=b³/c²

7 0

3 years ago