and i can NOT figure these out. help??
1. Derek approximated the perimeter of the rectangle below as 1,500 mm.
Which statement best describes Derek's approximation?
A.
It is slightly lower than the actual perimeter since each side was rounded to the nearest 10.
B.
It is slightly higher than the actual perimeter since each side was rounded to the nearest 10.
C.
It is significantly lower than the actual perimeter since each side was rounded to the nearest 100.
D.
It is significantly higher than the actual perimeter since each side was rounded to the nearest 100.
2.
A carpenter has a board that is feet long. She cuts the board into 3 equal pieces.
3. What is the length, in feet, of each board?
Janet uses her calculator to find the value of to use in the circumference formula. Her calculator shows this value as 3.141592654. Explain whether Janet's calculation for the distance around the tablecloth will be exact or an approximation.
4. According to Kayla’s science book, 1 liter of pure water has a mass of 1 kilogram. Kayla and Kyle each weigh the same liter of water on different scales.
•Kyle finds the mass to be 0.975 kilograms on his sliding-weight scale.
•Kayla finds the mass to be 0.98734 kilograms on her electronic scale.
Which sentence correctly describes how the precision and accuracy of Kyle’s and Kayla’s measurements compare with one another?
A.
Kyle’s measurement is more accurate, but Kayla’s measurement is more precise.
B.
Kayla’s measurement is more accurate, but Kyle’s measurement is more precise.
C.
Kyle’s measurement is both more accurate and more precise than Kayla’s.
D.
Kayla’s measurement is both more accurate and more precise than Kyle’s.
5. Four friends bowled 3 games each. Their scores at the end of each game are shown in the table below.
Which friend had the most precise set of bowling scores?
A.
Peter
B.
Vic
C.
Seth
D.
Ernie
6. Austin measures the width of a window to the nearest half foot. Lyle measures the width of the same window to the nearest inch.
Which statement must be true?
A.
Austin's measurement is more precise than Lyle's.
B.
Lyle's measurement is more precise than Austin's.
C.
Austin's measurement is more accurate than Lyle's.
D.
Lyle's measurement is more accurate than Austin's.
1. Derek approximated the perimeter of the rectangle below as 1,500 mm.
Which statement best describes Derek's approximation?
A.
It is slightly lower than the actual perimeter since each side was rounded to the nearest 10.
B.
It is slightly higher than the actual perimeter since each side was rounded to the nearest 10.
C.
It is significantly lower than the actual perimeter since each side was rounded to the nearest 100.
D.
It is significantly higher than the actual perimeter since each side was rounded to the nearest 100.
2.
A carpenter has a board that is feet long. She cuts the board into 3 equal pieces.
3. What is the length, in feet, of each board?
Janet uses her calculator to find the value of to use in the circumference formula. Her calculator shows this value as 3.141592654. Explain whether Janet's calculation for the distance around the tablecloth will be exact or an approximation.
4. According to Kayla’s science book, 1 liter of pure water has a mass of 1 kilogram. Kayla and Kyle each weigh the same liter of water on different scales.
•Kyle finds the mass to be 0.975 kilograms on his sliding-weight scale.
•Kayla finds the mass to be 0.98734 kilograms on her electronic scale.
Which sentence correctly describes how the precision and accuracy of Kyle’s and Kayla’s measurements compare with one another?
A.
Kyle’s measurement is more accurate, but Kayla’s measurement is more precise.
B.
Kayla’s measurement is more accurate, but Kyle’s measurement is more precise.
C.
Kyle’s measurement is both more accurate and more precise than Kayla’s.
D.
Kayla’s measurement is both more accurate and more precise than Kyle’s.
5. Four friends bowled 3 games each. Their scores at the end of each game are shown in the table below.
Which friend had the most precise set of bowling scores?
A.
Peter
B.
Vic
C.
Seth
D.
Ernie
6. Austin measures the width of a window to the nearest half foot. Lyle measures the width of the same window to the nearest inch.
Which statement must be true?
A.
Austin's measurement is more precise than Lyle's.
B.
Lyle's measurement is more precise than Austin's.
C.
Austin's measurement is more accurate than Lyle's.
D.
Lyle's measurement is more accurate than Austin's.