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Alina
2 months ago
9

A leather ball has a diameter of 28.4 cm. Which is the area of the piece of leather used on the surface of the ball?

Mathematics
2 answers:
Zina [12.3K]2 months ago
7 0

Result:

This has the same diameter as the sphere, while the height matches its diameter.... The surface area of a soccer ball equals 250 square inches.... An official basketball has a radius of 12.5 cm and... the amount of leather needed to cover 12 official balls.

Step-by-step explanation:

Svet_ta [12.7K]2 months ago
5 0

Result:

2534 cm^2 rounded to the nearest whole number.

Step-by-step explanation:

The ball conforms to the sphere formula for surface area, which is 4 pi r^2

The radius r = 1/2 the diameter = 1/2 * 28.4

= 14.2 cm.

The surface area calculation yields = 4 * pi * 14.2^2

= 2533.88 cm^2

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A toy train moves along its track at a rate of 132 feet per minute. What is this rate in miles per hour?
tester [12383]

Answer:

1.5 miles per hour

Step-by-step explanation:

Multiply 132 feet by 60 seconds to get 7920. Subtract 5280, the number of feet in a mile, leaving you with 1 mile and an additional 2640 feet, which amounts to half a mile.

8 0
2 months ago
A salesperson earns $8 per hour plus 6% commission on her sales. In a week when she worked 40 hours, her total earnings were $69
Zina [12379]

Answer:

6216.66

Detailed explanation:

(8*40)+6%*×=$692; 320 + 0.6x = 692; 0.6x=692-320; 0.6x=373; x=373÷0.6; x=6216.66

7 0
3 months ago
You and your friends Jose and Sarah all live on the same street. You know that Jose lives five blocks from away from you. Jose s
Svet_ta [12734]

Answer:

Please refer to the explanation

Step-by-step explanation:

Given that:

Sarah, Jose, and you all reside on the same street:

The distance between you and Jose is 5 blocks

The distance between Jose and Sarah is 2 blocks

Calculating the distance (b) between you and Sarah:

Since it is not specified if Sarah is closer to you or to Jose;

Thus;

Distance b from you to Sarah will be:

(The distance to Jose ± the distance to Sarah)

b = (5 ± 2)

b = (5 + 2) or (5 - 2)

b = 7 blocks or 3 blocks

4 0
1 month ago
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