I wrote these questions as one big question but decided to do them separately...
1 answer:
Answer:
448 tracks
Step-by-step explanation:
So first we need to figure out what 28% of 350 is and then add that value onto 350.
- First we need to convert 28% into a decimal or a fraction
- 28% is equivalent to 0.28,
, and
- I will use 0.28 for simplicity
To figure out what 28% of 350 is, we need to multiply 350 by one of the three options above
- (350)(0.28) = <u>98 tracks</u>
Now that we have figured out what 28% of 350 is, we can now add this value to 350 to get the total number of tracks.
- 350 + 98 = 448 tracks
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Answer:
B. 1.4 feet
Step-by-step explanation:
Let, the amount of increase be 'x' ft.
Since, the length and width of the canvas are 4 ft and 3 ft respectively.
Thus, area of the canvas, = length × breadth = 4 × 3 = 12 ft²
Since, the area of display model is twice the area of the canvas. We have,
= 2 ×
i.e. = 2 × 12
i.e. = 24 ft².
As, the length and width of the canvas are increased by 'x'.
The, length and width of the display model are (x+4) ft and (x+3) ft.
So, we get,
= length × breadth = (x+4) × (x+3) =
Since, = 24 ft²
i.e. = 24
i.e.
Solving the quadratic equation, we get,
i.e. x = -8.4 and x= 1.4
Since, the value of x cannot be negative.
Thus, x = 1.4 feet.