chaaaa

18.12.2020 • 

Mathematics

Which of these pizza slices gives the best value (the most pizza per dollar spent)?
A. a slice with a radius of 12 inches. central angle of 30 degrees, and a
cost of $3 per slice
B. a slice with a radius of 8 inches. central angle of 45 degrees. and a
cost of $2 per slice
C. a slice with a radius of 6 inches. central angle of 60 degrees, and a
cost of $2 per slice
D. a slice with a radius of 6 inches, central angle of 45 degrees, and a
cost of $1 per slice

Ответ:

cassidyhead27

14.02.2022

Mathematics

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B. a slice with a radius of 8 inches. central angle of 45 degrees. and a

cost of $2 per slice

Step-by-step explanation:

brainest plz

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Ответ:

dai77

22.12.2021

Mathematics

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The base of the box is b ft by b ft and the height is h ft. 
Since the volume is 40 ft³, 
h = 40/b² 

area of bottom = area of top = b² ft² 
area of one side = bh 
cost C = 2·4b² + 4·7bh 
= 8b² + 28b(40/b²) 
= 8b² + 1120/b 
dC/db = 16b - 1120/b² 

min cost when dC/db = 0 
16b = 1120/b² 
b = ∛70 ≅ 4.12 ft 
h = 40/b² ≅ 2.36 ft

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