Which is greater: (9+7) `xx` 1000 or 9 + 7 `xx` 1000?

The remainder when 7 xx 13 xx 19 xx 23 xx 29 xx 31 is divided by 6 is :

Calculate the uncertainty in the position of an electron if the uncertainty in its velocity is 5.7 xx 10^5 m//sec (h = 6.626 xx 10^(-34) kg m^2 s^(-1) , mass of the electron = 9.1 xx 10^(−31) kg ).

The remainder when 7 xx 13 xx 19 xx 23 xx 31 is divided by 6 is ….

Check the following for equality: (8-13) xx 7 and 8 - (13 xx 7)

Find the product of: (-9) xx (-8) xx (-7) xx (-6)

If roots of x^2-(a-3)x+a=0 are such that at least one of them is greater than 2, then a in [7,9] b. a in [7,oo] c. a in [9,oo] d. a in [7,9]

Write (a) 9.87 xx 10^(9), (b) 4.134 xx 10^(-4) and (c) 1.432 xx 10^(-9) in decimal form.