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3 years ago

NEED HELP NOW 70 POINTS! Divide. 2/3 ÷ 4/5 A.2/8 B.8/15 C.56 D.8/8

Mathematics

2 answers:

Grace [21]3 years ago

8 0

Hi,

Solution:

Find Common Denominators,

2/3 = 10/15

4/5 = 12/15

Divide,

10/15 ÷ 12/15 = 0.8333...

Turn into fraction;

0.8333... = 5/6

Answer - C. 5/6

scZoUnD [109]3 years ago

3 0

Multiply by reciprocal
2/3 * 5/4 = 10/12 = 5/6

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3 years ago

If a snowball melts so that its surface area decreases at a rate of 3 cm2/min, find the rate (in cm/min) at which the diameter d

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Answer:

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Step-by-step explanation:

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Implicit differentiation:

To solve this question, we differentiate the equation for the surface area implictly, in function of t. So

$\frac{dS_{a}}{dt} = 2d\pi\frac{dd}{dt}$

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This means that $\frac{dS_{a}}{dt} = -3$

Tind the rate (in cm/min) at which the diameter decreases when the diameter is 9 cm.

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3 years ago