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Harrizon [31]
4 years ago
11

Howard is laying an oak wooden floor in his house. The measurements of the floor are 14.5 feet by 40 feet. The wood is packaged

in boxes. Each box will cover 18 square feet. How many boxes of wood must be purchased to cover the floor?
Mathematics
1 answer:
tatyana61 [14]4 years ago
8 0
First you need to find the area of the floor to know how much wood you need
Area=lengthxwidth, so A=40x14.5 which equals 580 square ft
With a floor that's 580 square ft and the boxes cover 18 Sq ft each then all you have to do is 580/18= 32.222 and because you can't buy .222 of a box you need to round up to 33 boxes
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Two students from a group of eight boys and 12 girls are sent to represent the school in a parade. If the students are chosen at
kari74 [83]

Answer:

Step-by-step explanation:

* Lets explain how to find the probability of an event  

- The probability of an Event = Number of favorable outcomes ÷ Total

 number of possible outcomes

- P(A) = n(E) ÷ n(S) , where

# P(A) means finding the probability of an event A  

# n(E) means the number of favorable outcomes of an event

# n(S) means set of all possible outcomes of an event

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- P(A and B) = P(A) . P(B)

* Lets solve the problem

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∴ The probability of not girls = 1 - P(girls)

∵ The were 20 students in the group

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∴ The probability of chosen a first girl = 12/20

∵ One girl was chosen, then the number of girls for the second

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∴ The were 19 students in the group

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- To find the probability of both not girls is 1 - P(both girls)

∴ P(not both girls) = 1 - (33/95) = 62/95

* The probability that the students chosen are not both girls is 62/95

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Answer:

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Step-by-step explanation:

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