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Ronch [10]
3 years ago
6

What’s the correct answer for this?

Mathematics
1 answer:
Luba_88 [7]3 years ago
6 0

Answer:

B. The radius

Step-by-step explanation:

The area of a sector of a circle is ½ r² ∅, where r is the radius and ∅ the angle in radians subtended by the arc at the centre of the circle so we need to know the radius for it

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3 years ago
A rectangle initially has dimensions 6 cm by 7 cm. All sides begin increasing in length at a rate of 1 cm/s. At what rate is the
Morgarella [4.7K]

Answer:

  49 cm²/s

Step-by-step explanation:

The problem statement tells you what to do.

Write an equation relating A, b, h:

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Differentiate with respect to t:

  dA/dt = (db/dt)h + b(dh/dt) . . . . . . . product rule

To find the rate of change after 18 seconds, you need to know the dimensions b and h after 18 seconds. Since each dimension was increasing at the rate of 1 cm/s, it is 18 cm more than it was at the beginning:

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Of course, db/dt = dh/dt = 1 cm/s. Then the rate of change of area is ...

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_____

You could write a formula for the area as a function of time and differentiate that:

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Then the derivative is ...

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and when t=18, this is ...

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7 0
3 years ago
Whats 4/9 divided by 3/7 equal
Alexeev081 [22]

Answer:

1.03703703704

Step-by-step explanation:

i d k if this is what ur looking for but hope this helped :)

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Answer:

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