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4 months ago

21 increased by twice Gail's height Use the variable g to represent Gail's height.

Mathematics

1 answer:

dmitriy555 [2]4 months ago

6 0

The expression represented by 21 increased by twice Gail's height is 21 + 2g

<h3>What are expressions?</h3>

Expressions are mathematical statements that are represented by variables, coefficients and operators

<h3>How to translate the algebraic expression?</h3>

The expression is given as

21 increased by twice Gail's height

Where

g represents Gail's height

So, we have

21 increased by twice Gail's height ⇒ 21 increased by twice g

Twice means 2*

So, we have

21 increased by twice Gail's height ⇒ 21 increased by 2g

increased by means +

So, we have

21 increased by twice Gail's height ⇒ 21 + 2g

Hence, the expression represented by 21 increased by twice Gail's height is 21 + 2g

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Assume that the radius r of a sphere is expanding at a rate of 40 cm/min. The volume of a sphere is V = 4 3 πr3 and its surface

Scrat [10]

Answer:

The rate of change in surface area when r = 20 cm is 20,106.19 cm²/min.

Step-by-step explanation:

The area of a sphere is given by the following formula:

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In which A is the area, measured in cm², and r is the radius, measured in cm.

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This means that $\frac{dr}{dt} = 40$

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This is $\frac{dA}{dt}$ when $r = 20$ . So

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Applying implicit differentiation.

We have two variables, A and r, so:

$\frac{dA}{dt} = 8r\pi \frac{dr}{dt}$

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$\frac{dA}{dt} = 20106.19$

The rate of change in surface area when r = 20 cm is 20,106.19 cm²/min.

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2 years ago

Okay i have two 'true or false' questions from algebra 1:

rusak2 [61]

1.) False
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2 years ago

5x-9=15+11x<br><br> The solution for x is x=?

Wittaler [7]

Answer:

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Step-by-step explanation:

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