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Genrish500 [490]
3 years ago
10

Please help and please explain

Mathematics
1 answer:
Softa [21]3 years ago
3 0

Answer:

3) B. 77 flowers

4) A. 62.8

Step-by-step explanation:

3) First find the area. The area of a circular flower bed is found using the formula for a circle A = πr². Here the diameter is 14 so r =7.

Substitute  r = 7.

A = π(7)² = 49π = 153.86 square feet.

Each flower requires 2 square feet.

Divide the area by 2 for the number of flowers.

153.86 / 2 = 76.93 = 77

4) First find the area of the entire circle. The area is found using the formula for a circle A = πr².

Substitute  r = 6.

A = π(6)² = 36π = 113.04 square feet.

Now find the area of the small circle inside. Then subtract the two areas.

The area is found using the formula for a circle A = πr².

Substitute  r = 4.

A = π(4)² = 16π = 50.24 square feet.

The shaded area is 113.04 - 50.24 = 62.8.

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3 0
3 years ago
A circle of red roses is planted in Lowell's central park. The circle has a radius of 1 meter.
Damm [24]

Answer:

The circle's circumference is 6.28 m.

Step-by-step explanation:

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The circle has a radius of 1 meter.

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4 0
3 years ago
2. How many square yards of carpet will be needed for a 21 ft by 15 ft room?
ipn [44]

Answer:

The answer to your question is: 35 yd²

Step-by-step explanation:

To solve this problem, just find the data, the formula, substitute the values in the formula and find the result.

Data

Square yards = ?

Length = 21 ft

Width = 15 ft

Formula

Area of a rectangle = length x width

Substitution

Area of a rectangle = 21 ft x 15 ft

Area of a rectangle = 315 ft²

Area of a rectangle = square yards of carpet

Finally, convert ft² to yd²

315 ft² = 35 yd²

Result

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Answer:

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