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saw5 [17]
2 years ago
10

Which expression gives the surface area of a sphere with radius r?

Mathematics
1 answer:
Leviafan [203]2 years ago
5 0

Answer:

Area of sphere is given by 4 · \pi · r^2

Step-by-step explanation:

The surface area of sphere is given by:

Area of sphere =4 · \pi · r^2

Option C and D are correct but  is missing in the options

Option A and B are incorrect.

\pi =3.14 to solve the area of sphere when radius is given a constant value.

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How do you solve<br> 25n=70
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You want to do to one side the same thing you do to the other side.

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\frac{25n}{25} =  \frac{70}{25}

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3 years ago
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Dafna1 [17]

Answer:

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Step-by-step explanation:

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3 years ago
Read 2 more answers
Blue Star is starting a new distribution service that delivers auto parts to the service departments of auto dealerships in the
marusya05 [52]

Answer:

Blue Star

a.                                   The Ford TriVan   The Honda CityVan

Total life-cycle costs          $94,368                $90,936

Based on life cycle cost, the Honda CityVan is the best choice.

b. Blue Star needs to put on the Ford TriVan 9,032 miles more for the cost to be equal with the Honda CityVan's.

c. The crossover point in years = 5 months

Step-by-step explanation:

a) Data and Calculations:

                                        The Ford TriVan   The Honda CityVan

Purchase costs                  $28,000                 $32,000

Fuel efficiency per gallon   24 miles                 37 miles

Operating cost per mile     $0.20                     $0.22

Total operating costs         $4,400                   $4,840

Estimated annual distance 22,000 miles        22,000 miles

Gallons of fuel consumed  916.7 (22,000/24) 594.6 (22,000/37)

Total cost of fuel                 $3,896                  $2,527

Fuel cost per mile              $0.18                      $0.115

Total cost per mile             $0.38                     $0.335

Expected life of truck         8 years                   8 years

Average gas price = $4.25 per gallon

Total costs:

                                        The Ford TriVan   The Honda CityVan

Annual costs:

Total operating costs         $4,400                   $4,840

Total cost of fuel                $3,896                   $2,527

Annual costs                      $8,296                   $7,367

Life cycle costs:

Annual costs for 8 years   $66,368                $58,936

Purchase costs                  $28,000                $32,000

Total life-cycle costs          $94,368                $90,936

Difference in costs between Ford TriVan and Honda CityVan = $3,432 ($94,368 - $90,936)

Miles to put on the Ford TriVan for the life cycle cost to be equal to the life cycle cost of the Honda CityVan

= Difference in costs divided by total cost per mile of the Ford TriVan

= 9,032 miles ($3,432/$0.38)

Annual distance = 22,000 miles

Monthly distance = 1,833 miles

9,032/1,833 = 4.93 months or 5 months approximately

3 0
3 years ago
Fransico had 2 1/2 pizzas left over after his birthday party. The next day he and his family ate 1 1/4 of the left over pizza. H
zavuch27 [327]

Answer:

2 2/4 - 1 1/4 = 1 1/4

Step-by-step explanation:

Hope this helps!

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5 0
2 years ago
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