1
Q
A number, x, rounded to three significant figures is 24100, write down the error interval for x
A
24050
2
Q
A number, y, rounded to two decimal places is 12.36, write down the error interval for y
A
12.355
3
Q
10 ( to the -2) x 2 ( to the -4)
A
put them in fractions first
10 ( to the -2) means 1 over 10 ( to the 2)
so it is one over 10 squared ( 100 ) x one over 2x2x2x2 (16)
one over 100 x one over 16 = one over 1600
4
Q
Which number describes the horizontal movement in a vector?
A
The top number
