1. Rosa, Roberto, Andrea, and Inno find an estimate for the square root of 10. Who has proposed the best solution?

Question

A. Rosa: "Use the square root of 9 and the square root of 25 to estimate."
B. Roberto: "I will use the square root of 4 and the square root of 9."
C. Andrea: "It should be the square root of 11 and the square root of 12."
D. Inno: "Use the square root of 9 and the square root of 16 to find the estimate."

2. Joy knits a square blanket that has an area of 1,500 square inches. What is the approximate length of each side of the blanket?

A. 16 inches
B. 27 inches
C. 39 inches
D. 42 inches

3. An example of an irrational number is ___.

A. -the square root of 17
B. the square root of 16
C. -the square root of 9\
D. the square root of 1

4. Which statement is true?

A. Every real number is an integer.
B. Every rational number is a real number.
C. Every rational number is a perfect square.
D. EVery integer is an irrational number.

5. As an estimate for the square root of 47 is between ___.

A. 4 and 5
B. 5 and 6
C. 6 and 7
D. 7 and 8

6. An estimate for -the square root of 72 is ___.

A. -8.1
B. -8.5
C. -9.1
D. -9.5

7. The formula v=the square root of 64h can be used to find the velocity, v, in feet per second, of an object that has fallen h feet. Find the velocity of an object that has fallen 75 feet. Round to the nearest tenth.

A. 6.9 fts/s
B. 69.2 ft/s
C. 69.4 ft/s
D. 69.3 ft/s

8. When a skydiver jumps from an airplane, the distance d in feet the diver falls in t seconds before opening the parachute is given by the formula d=16t^2. The formula assumes that there is no air resistance. Find the time it takes a skydiver to fall 1,551 ft before opening the parachute. Round to the nearest tenth.

A. 9.7 s
B. 9.8 s
C. 9.9 s
D. 2.5 s

Answer 1

1. 3^2 = 9 and 4^2 = 16 so sqrt 10 is between 3 and 4
2. sqrt 1500 = 10 sqrt 15 which is a little less than 10*4
3. oh come on, you try some. all of your choices but one are perfect squares.