2 years ago

How to derive the formula for the surface area of a cylinder?

Mathematics

1 answer:

DaniilM [7]2 years ago

7 0

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Someone help me ! Please

zzz [600]

Answer:

the answer would be B

Step-by-step explanation:

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3 years ago

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Is the inequality always, sometimes, or never true?<br> 3x - 14 < 3(x-5)

lys-0071 [83]

Answer:

3x - 14 < 3x - 15

-14 < -15

never true

Step-by-step explanation:

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3 years ago

The perimeter of a square is 24 4/9 in, and its side is 6 1/9 in. Find its area.

ra1l [238]

Area = side * side
Area of the square = 6 1/9 * 6/1/9
= 36 1/81

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2 years ago

twinlakes on the shelf of a covenience store lose their fresh tastines over time. we say that the taste quality is 1 when the tw

Zolol [24]

Answer:

The graph is shown below.

The time to make the taste to half is <u>4.265 s.</u>

Step-by-step explanation:

Given:

Initial value of the taste is, $Q_0=1$

Therefore, the quality of taste over time 't' is given as:

$Q(t)=Q_0(0.85)^t\\Q(t)=1(0.85)^t$

Now, when the taste reduces to half, $Q=0.5$

Therefore,

$0.5=1(0.85)^t$

Taking natural log on both the sides, we get:

$\ln(0.5)=\ln(0.85)^t\\\ln(0.5)=t\ln(0.85)\\t=\frac{ln(0.5)}{\ln(0.85)}=4.265\ s$

Therefore, the time to make the taste to half is <u>4.265 s.</u>

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2 years ago

Billy bob uses a 10-square model to find 20% of 80. what is 20% of 80? EXPLAIN how Billy Bob can use this model to find 20% of 8

Dvinal [7]

Percentages are numbers that are units of 100

The value of 20% of 80 is 16

<h3>How to determine the percentage value</h3>

The model is not given.

However, the percentage value can still be calculated

The expression is given as:

$20\%\ of\ 80$

Express of as product

$20\%\ * 80$

Express 20 % decimal

$0.20* 80$

Evaluate the product

Hence, 20% of 80 is 16