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andrezito [222]
3 years ago
10

Martiana estimates that the suface area of a rectangular prism with a lenth of 13.2 feet, a width of 6 feet and a height of 8 fe

et is about 460 square feet. Is her estimate reasonable? Explain you reasoning
Mathematics
1 answer:
lawyer [7]3 years ago
8 0
Yes because i got 487.2
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pashok25 [27]

Step-by-step explanation:

Since, y varies inversely as x.

\therefore \: y =  \frac{k}{x}  \\ (k = constant \: of \: proportionality) \\   \therefore \: xy =  k...(1) \\ plug \: y = 194 \:  \: and \:  \: x =  - 13 \: in \: (1) \\ \therefore \:  - 13 \times 194=  k \\ \therefore \: k =  - 2522 \\ substituting \: k =  - 2522 \: in \: (1) \\ xy =  - 2522...(2) \\ this \: is \: equation \: of \: variation. \\ plug \: x = 50 \: in \: (2) \\ 50 \times y =  - 2522 \\  \therefore \:y =  \frac{ - 2522}{50}  \\   \huge \red{ \boxed{\therefore \:y =   - 50.44}}

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Another payment type enabled by smartphones is person-to-person payments, which are apps that allow people to send money electro
Galina-37 [17]

Answer and Step-by-step explanation:

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8. The graph of a horizontal line is a function. True False
11111nata11111 [884]

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