Please help!
Two semicircles are placed in a rectangle. The width of the rectangle is 7 cm.

Find the area of the shaded region. Use the value 3.14 for pi , and do not round your answer.

Step-by-step explanation:

length=4×7=28 cm

width=7 cm

area of rectangle=28×7=196 cm²

area of two equal semicircles =area of circle=π×7²=49π

area of shaded region=196-49π=49(4-π)≈49(4-3.14)≈49×0.86≈42.14 cm²

step-by-step explanation:

if you want to solve percent error follow these steps.

1. subtract the accepted value from the experimental value.

2. take the absolute value of step 1.

3. divide that answer by the accepted value.

4. multiply that answer by 100 and add the % symbol to express the answer as a percentage.

if you want to solve percent of change just do this.

1. work out the difference (increase) between the two numbers you are comparing.

2. divide the increase by the original number and multiply the answer by 100. if your answer is a negative number then this is a percentage decrease.

hope this : )

so, converting firstly the mixed fractions to improper fractions and then "adding".