Solving Equations
6x=18
x=3
Find the area of a circle with a radius of 5 cm.
25pi or 78.5cm
A student measures the length of a pencil and gets a result of 7.8 cm. The actual length of the pencil is 8.0 cm. What is the percent error?
2.5%
-2+9
7
3x+6=24
X=6
Find the area of a circle with a diameter of 12 inches.
113.04in or 36pi
A thermometer measures the boiling point of water to be 100.5°C, while the accepted value is 100.0°C. What is the percent error?
0.5%
-10-5
-15
3x−5=16
x=7
Find the area of a circle with a radius of 7 meters.
153.9384m or 49pi
A student measures the mass of a rock to be 98.4 grams, while the accepted mass is 100 grams. What is the percent error?
1.6%
-57-96
-153
4y+8=20
y=3
Find the area of a circle with a radius of 15 cm.
225pi or 706.5cm
A student measures the length of a metal rod to be 15.5 cm. The true length of the rod is 15.8 cm. What is the percent error?
1.90%.
-48-(-12)
-36
4(z+3)=2z+18
z=3
Find the area of a circle with a circumference of 20 meters.
31.8m
The accepted value for the volume of a cylinder is 50.0 cm³. A student measures the volume to be 52.5 cm³. What is the percent error?
5.0%.
-24+-18
-42