Find the distance between (-4,-3) and (-8,7)
1 answer:
Answer:
√116 (or 10.77)
Step-by-step explanation:
(refer to attached )
in this case the points given are (-4,-3) and (-8,7)
hence x1 = -4, y1 = -3, x2 = -8, y2 = 7
D = √[ (x2-x1)² + (y2-y1)² ]
= √[ ( -8 - (-4) )² + ( 7 - (-3) )² ]
= √[ ( -8 +4 )² + ( 7 + 3 )² ]
= √[ ( -4 )² + ( 10 )² ]
= √[ ( 16 ) + ( 100 ) ]
= √116
= 10.77
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2 sack of cement is needed to cover entire floor of Joel
<em><u>Solution:</u></em>
Given that a sack of cement is enough to cover a floor with a total area of 45 sqft
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To find: Number of sacks needed to cover entire floor of Joel
Let us first find area of Joel's floor
Since the floor is generally of rectangular, we can use area of rectangle
<em><u>So the total area of floor with length 8 feet and width 7 feet is:</u></em>
Thus the total area of floor is 56 square feet
<em><u>Let us now find number of sacks needed to cover entire floor</u></em>
Given that, one sack of cement covers 45 square feet
Since Sack of cement cannot be in point value hence we can say 2 sack of cement is required.