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77julia77 [94]
3 years ago
10

Find the area of a triangle with base 31 inches and height 17 inches

Mathematics
2 answers:
Anarel [89]3 years ago
7 0

The area of triangle with base 31 inches and height 17 inches is 263.5 inches^2

<u>Solution:</u>

Given that,

Base of triangle = 31 inches

Height of triangle = 17 inches

<em><u>To find:</u></em> Area of Triangle

<em><u>Formula used:</u></em>

Area of Triangle = \frac{1}{2} \times base \times height

Plugging in the given values in formula, we get,

Area of Triangle = \frac{1}{2} \times 31 \times 17\\\\= \frac{527}{2} = 263.5

Thus the area of triangle is calculated as 263.5 inches^2

Elza [17]3 years ago
6 0

Answer:

263.5 in^2

Step-by-step explanation:

31/17=527

527/2=263.5

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Question 11.4.10

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Question 11.4.16

Refer to the diagram below. Let's say we had 1000 people surveyed. This means we have 1000 in the bottom right corner to represent the grand total.

40% have a pet now currently and also had a pet in the past, so we have 0.40*1000 = 400 people go in the upper left corner of the table. This is the "have a pet now" row and "had a pet in the past" column.

60% do not have a pet now, so 600 people don't have a pet currently. This is the total for row 2. This must mean 1000-600 = 400 people do have a pet currently. This is the total for row 1.

The missing value in row 1 must be 0 because 400+0 = 400. Also, if a person has a pet now, they likely had it in the past as well. To be honest, the wording to set up the time scale for this problem is vague. What does it mean "in the past"? Do the researchers mean in the previous month? Year? It's not clear. Anyway, the first row consists of 400, 0 and 400 in that order.

----------------------

Then we're told that 85% have had a pet in the past. So 0.85*1000 = 850 people had a pet in the past. This goes at the bottom of the "had a pet in the past" column. This leaves 1000-850 = 150 people who didn't have a pet in the past.

Lastly, 15% of the 1000 people surveyed don't have a pet in the present and they didn't have it in the past either. Since 15% of 1000 = 0.15*1000 = 150, we will write 150 in the second entry of row 2. Notice how 0+150 = 150 for the second column. Every row should add up to the entry in the "total" column, and every column should add up to the entry in the "total" row to help check we have the correct table set up. Lastly, notice how 400+600 = 1000 and 850+150 = 1000 to further verify the table.

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