<span>- The triangular patches have an area of 63 cm</span>² (A1= 63 cm²)<span>. - The rectangular piece of fabric is 27 centimeters long and 21 centimeters wide.
1. Then, the first thing you must do is to calculate the area of the piece of fabric. The formula for the area of a rectangle is:
A2=LxW
L=27 centimeters (The lenght of the rectangle) W=21 centimeters (The width of the rectangle)
2. When you substitute the values of L and W into the formula, you obtain:
A2=(27 cm)(21 cm) A2=567 cm</span>² <span> 3. Then, let's calculate how many triangular patches she can cut from a rectangular piece of fabric:
Compound percentage reduction can be calculated by multiplying the initial number by (1-x)^t where x is the percentage reduction (/100, i.e. 1% reduction is 0.01), and t is the number of times it has reduced.
So: a) Where t is the number of weeks.
We can then just substitute in to work out the final pressure: b) p = 45*0.94^6 = 31psi
