Perfect Squares and Cubes
square root of 81
+-9
50 - square root of 400
30
Square root of 52
in between square roots of 49 and 64 which is 7 and 8. 52 is 3 away from 49 and 8 from 64 meaning it is closer to 7 the answer must be less than 7.5
7.1, 7.2, 7.3
What is the side length of a square with a perimeter of 36ft?
P=4s
9ft
convert 6/11 to a decimal
0.54 repeating
3 cubed
27
6 - 2 (square root of 64)
-10
cube root of 21
cube root of 21 is in between the perfect cube roots of 8 and 27 which is 2 and 3. 21 is 13 away from 8 and 6 away from 27. This means that the estimation is going to be closer to 3.
2.7 and 2.8
What is the area of a square with the side lengths of 9 in.?
A=s squared
81 squared in
square root of -400
No real solution, you cannot square root a negative number
x squared + 12 = 61
x=7
square root of 32
it is in between the perfect sqaure roots of 25 and 36 which is 5 and 6. 32 is 7 away from 25 and 4 away from 36 which makes it closer to 6.
5.6 or 5.7
What is the volume of a cube with the side length of 7cm?
V=s cubed
343 cubic cm
Cube root of -8/27
-2/3
3x cubed = -648
x= -6
cube root of -268
268 is in between the perfect cube roots of 216 and 343 which is 6 and 7. 268 is 52 away from 216 and 75 away from 343. This means the estimation is closer to 6.
6.3 or 6.4
What is the side length of a cube with the volume of 1000 cubic meters?
V=s cubed
10 meters
What two perfect squares have the last two digits flipped and what are they?
132=169
142=196
67 - ((cube root of 41) cubed)
26
5 (square root of 92)
92 is in between the perfect square roots of 81 and 100 which is 9 and 10. 92 is 11 away from 81 and 8 away from 100 making it closer to 10. This estimation is 9.6 or 9.7
9.6(5)= 48
9.7(5)= 48.5
what is the side length of a cube with the surface area of 54 squared in?
SA=6 (s sqaured)
3