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2 years ago

98 POINTS AVAILABLE

Mathematics

2 answers:

Elis [28]2 years ago

7 0

1st question:

The formula for area of a triangle given 3 side lengths is A = √(s(s-a)(s-b)(s-c))

where s = (a+b+c)/2

s = (50 + 45 + 25) /2 = 120/2 = 60

Area = √(60(60-50)(60-45)(60-25)

Area = √(60*10*15*35)

Area = √315000

Area = 561.25

Rounded to nearest whole number = 561 square meters.

2nd question:

b. Increasing the number of trapezoids increases the accuracy of the area calculation

c. The area of all the trapezoids can be added together to find the area under the curve.

Helga [31]2 years ago

4 0

Answer:

how do i exit

Step-by-step explanation:

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3 years ago

M is directly proportional to r2 <br> When r=2, m=14<br> Work out the value of m when r=12

Genrish500 [490]

we have M is durectly porpotional to r^2

so M=(k)r^2

and when r=2, m=14

so 14=(k)(2)^2

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so when r=12

m= (7/2)(12)^2 =(7/2)(144) = 504

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2 years ago

Alexia took out a 12-year loan for $72000 to renovate her home. If her monthly payments are $680, what is the interest rate?

mart [117]

Answer:

intrest equation

I/PT = R

$680 / $72,000 x 12 years = R

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or rounded 8%

Step-by-step explanation:

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3 years ago

The sales tax in your city is 4.4%, and an item costs $3 before tax.

defon

Answer:

0.132

Step-by-step explanation:

4.4%*3=0.132

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3 years ago