2 years ago

Jose found a beach ball in his garage. He wants to know how much plastic was used to

Mathematics

1 answer:

Serjik [45]2 years ago

4 0

Answer:

about 616 in²

Step-by-step explanation:

The area of a sphere is given by ...

A = πd²

For a ball 14 inches in diameter, the area is ...

A = π(14 in)² = 196π in²

A ≈ 616 in²

The area of the required plastic is about 616 square inches.

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Expand the polynomial:<br> (5a+1/5 b)^2

WINSTONCH [101]

Expand the following:
(5 a + b/5)^2

(5 a + b/5) (5 a + b/5) = (5 a) (5 a) + (5 a) (b/5) + (b/5) (5 a) + (b/5) (b/5):
5×5 a a + (5 a b)/5 + (5 b a)/5 + (b b)/(5×5)

(5 a b)/5 = 5/5×a b = a b:
5×5 a a + a b + (5 b a)/5 + (b b)/(5×5)

(b×5 a)/5 = 5/5×b a = b a:
5×5 a a + a b + b a + (b b)/(5×5)

Combine powers. (b b)/(5×5) = (b^(1 + 1))/(5×5):
5×5 a a + a b + b a + (b^(1 + 1))/(5×5)

1 + 1 = 2:
5×5 a a + a b + b a + (b^2/5)/5

5 a×5 a = 5×5 a^2:
5×5 a^2 + a b + b a + (b^2/5)/5

5×5 = 25:
Answer: 25 a^2 + a b + b a + (b^2/5)/5

3 0

3 years ago

Read 2 more answers

Jane was paid $316 for 40 hours of work. Use compatible numbers to find about how much

Vinvika [58]

Answer:

$7.9 /hour

Step-by-step explanation:

$316/40 = $7. 9per hour

4 0

3 years ago

Need help ASAP, willing to give brainliest to the best answer!