3 years ago

How do I find the area of the circular racetrack?

Mathematics

1 answer:

BabaBlast [244]3 years ago

6 0

Answer:

8483 ft²

Step-by-step explanation:

Subtract the area of the smaller circle from the area of the greater circle

Greater Circle area:

πr² = π × 140²

= 61583.2 ft²

Smaller Circle area:

= π × 130²

= 53099.8 ft²

Area of track:

61583.2 - 53099.8 = 8483.4ft²

= 8483ft² (to the nearest ft²)

You might be interested in

The price of an item has been reduced by 95% the original price was $17

cricket20 [7]

Answer:$0.85

Step-by-step explanation:

.95x17= 16.15 17.00-16.15=0.85

5 0

3 years ago

Read 2 more answers

A certain forest covers an area of 4600km. Suppose that each year this area decreases by 7.75%. What will the area be after 13 y

wolverine [178]

Answer:

$1679.60\ km^2$

Step-by-step explanation:

-We can use the exponential decay function to estimate the size after 13 years:

$P_t=P_oe^{-rt}$

Where:

$P_t$ is the size after t years, t is the time, r is the rate of decay and $P_o$ the original size.

#We substitute and calculate as:

$P_t=P_oe^{-rt}\\\\=4600e^{-13\times 0.0775}\\\\=1679.60$

Hence, the forest covers $1679.60\ km^2$ after 13 years.

4 0

3 years ago

What does x equal in 3.8x = -19

Sauron [17]

Answer: -5

Step-by-step explanation:

3 0

2 years ago

Read 2 more answers

Trina, James, and Michael are training for a 10-kilometer race. After 30 minutes of a training run, Michael lead the group, and

Llana [10]

Answer:

1/3

Step-by-step explanation:

1/2 James' fraction of Michael

2/3 Trina's fraction of James

1/2 x 2/3 = 1/3

5 0

3 years ago

PLS HELP ITS A SIMPLE EQUATION I GIVE 30 PTS AND BRANLIEST

KengaRu [80]

Answer:

- 59/40

Step-by-step explanation:

8 0

2 years ago

Read 2 more answers