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julia-pushkina [17]

3 years ago

15

A rectangular

1 answer:

igor_vitrenko [27]3 years ago

8 0

A = length x width

15,000 = (w + 30) x w
15,000 = $w^{2}$ + 30w
0 = $w^{2}$ + 30w - 15,000

Use quadratic formula to find that w= -15 + or - 5 $\sqrt{609}$ . Because distance cannot be negative, the width is -15 + 5 $\sqrt{609}$ meters or approximately 108.39 meters. This means that the length is approximately 138.39 meters.

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Ratling [72]

Answer:

15) f = 18

3f = 54

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Step-by-step explanation:

15)

3f + 6f + f = 180

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16)

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3 years ago

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MrRissso [65]

Answer:

Option (4).

Step-by-step explanation:

Outer diameter of the hollow metallic ball = 10 centimeters

Outer radius of this ball = $\frac{10}{2}$ = 5 cm

Volume of the outer ball $V_{1}$ = $\frac{4}{3}\pi (r)^3$

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Volume of the inner hollow ball $V_{2}$ = $\frac{4}{3}\pi (4)^3$

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3 years ago