3 years ago

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Mathematics

1 answer:

ira [324]3 years ago

4 0

Answer:

10...

Step-by-step explanation:

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Find the surface area of a cylinder with a base radius of 2 cm and a height of 8 cm

gtnhenbr [62]

Answer:

82.6cm2

Step-by-step explanation:

$\pi {r}^{2} + \pi {r}^{2} + 2 \pi \: r h$

$\pi = \frac{22}{7}$

radius =2cm

height=8cm

$( \frac{22}{7} \times 2 \times 2 )+ ( \frac{22}{7} \times 2 \times 2) + (2 \times \frac{22}{7} \times 2 \times 8)$

Multiplying the numerators and The whole numbers, we have

$\frac{88}{7} + \frac{88}{7} + \frac{402}{7}$

Since the denominators of the fractions are the same, we add the numerators.

$\frac{88 + 88 + 402}{7} = \frac{578}{7} \\ which \: becomes \\$

$82.57{cm}^{2} = 82.6 {cm}^{2}$

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3 years ago

If two lines are perpendicular, what is the product of their slopes?

Nadusha1986 [10]

The product of the slopes would be -1 because the slopes of two lines that are perpendicular are opposite reciprocals (ex. 2 and -1/2 multiplied together would be -1)

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3 years ago

What is the value of the expression “eight more than three times the difference of four and a number” when n = 3?

Yuri [45]

Answer:

Step-by-step explanation:

8 + 3*(4-3) = 8 + 3*1 = 8+3 =11

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3 years ago

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Five squares are positioned as shown. The small square indicated has area 1 . What is the value of h?

shepuryov [24]

Answer:

Step-by-step explanation:

Each box is 1 larger than the earlier one, so the boxes are 1, 2, 3, 4, and 5.

4 + 5 is the width across the bottom

2 + 3 is the width across the top (not counting h)

9 - 5 = 4, so h = 4

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2 years ago

Lois has 1/2 a pie that she must divide equally with four friends. She cuts five pieces of pie

Reil [10]

Answer:

1/10

Step-by-step explanation:

1/5 * 1/2 = 1/10

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3 years ago