What volume of a 0.250 M sucrose solution must be used to prepare 400.0 mL of a 0.0310 M solution?

i dont know it

step-by-step explanation:

the expected value of the random variable : 0, 1 and 2

step-by-step explanation:

225x²+4=0

225x²=0-4

225x²=-4

x²=-4/225

x=±√-4/225

d. 8

step-by-step explanation:

the given radical expression is:

we can rewrite this as:

we express as square numbers to get;

the exponents will now cancel out to give.

the correct answer is d