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damaskus [11]
2 years ago
10

Please help

Mathematics
1 answer:
rewona [7]2 years ago
5 0

Answer:

125.6m^2

Step-by-step explanation:

Let R be the greater radius and r be the smaller radius

Area of the sidewalk = R^2 - r^2 - This can be the expression

= 3.14

=(R^2-r^2)

=(11^2-9^2)

=(121-81)

= 40

= 3.14 x 40

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Answer:

y< -3/2x-2

Step-by-step explanation:

if you look at the graph, you can see the line is dotted, which means it is not equal to. eliminate a and c. the shade is toward the bottom of the y, which then you could eliminate a because b says the y value is greater than, which isn't true. you could also check it by plugging in any value for x!

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6 0
3 years ago
The time it takes a runner to complete a race is inversely related to the speed of the runner if a runner can complete a race in
PilotLPTM [1.2K]
35.6 minutes

S = v*t = 8 * 40/60 = 16/3 m
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3 years ago
On his outward journey, Ali travelled at a speed of s km/h for 2.5 hours. On his return journey, he increased his speed by 4 km/
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Answer:

3.08 km/h.

Step-by-step explanation:

We know that,

Speed=\dfrac{Distance}{Time}

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2.5=\dfrac{d}{t}

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On his return journey, he increased his speed by 4 km/h and saved 15 minutes. So, distance is d and times is t-15.

4=\dfrac{d}{t-15}

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Now,

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Total time = t + t - 15 = 40 + 40 - 15 = 65

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\text{Average speed}=\dfrac{\text{Total distance}}{\text{Total time}}

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3 years ago
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