Mathematics: Sachiko is framing the border of a square picture. if she knows the area of the picture, how could sachiko determine the amount of framing material she needs to buy?

Sachiko is framing the border of a square picture.

Graciesett4072

26.05.2020

Amount of framing material she need to buy = 4a, where a is the side of square.

a is found out by taking square root of area of picture.

Explanation:

Let the side of square be a. The area of a rectangle is breadth x width. Here breadth = width = side of square

Area of square = a x a = a^2

It is given that area of picture is known, so she can find side of the square by finding square root of the area.

The perimeter of square is given by 4 times the side of square.

We know the side of the square, so we can calculate the perimeter.

Amount of framing material she need to buy = Perimeter of square = 4a

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potatogirl9300

01.02.2022

Step-by-step explanation:

h(t) = (t + 3)² + 5

A) h(t) = (t + 3)² + 5 -2 ≤ t ≤ 0

average rate of change in h over the change in t is given as:

$\frac{h(0)-h(-2)}{0-(-2)}=\frac{(0+3)^2+5-[(-2+3)^2+5]}{0+2}=\frac{14-6}{2} =4$

It does not have a negative average rate of change

B) A) h(t) = (t + 3)² + 5 -4 ≤ t ≤ -3

average rate of change in h over the change in t is given as:

$\frac{h(-3)-h(-4)}{-3-(-4)}=\frac{(-3+3)^2+5-[(-4+3)^2+5]}{-3+4}=\frac{5-6}{1} =-1$

It have a negative average rate of change

c) A) h(t) = (t + 3)² + 5 -3 ≤ t ≤ 4

average rate of change in h over the change in t is given as:

$\frac{h(4)-h(-3)}{4-(-3)}=\frac{(4+3)^2+5-[(-3+3)^2+5]}{4+3}=\frac{54-5}{7} =7$

It does not have a negative average rate of change

D) h(t) = (t + 3)² + 5 1 ≤ t ≤ 4

average rate of change in h over the change in t is given as:

$\frac{h(4)-h(1)}{4-(1)}=\frac{(4+3)^2+5-[(1+3)^2+5]}{4-1}=\frac{54-21}{3} =11$

It does not have a negative average rate of change

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