Answer:
may i ask if this is geometry or algibra. i'll be able to help if i know what type of math it is.
Step-by-step explanation:
A double replacement reaction occurs when the ionic parts of two ionic compounds are exchanged.
Reaction 1 results in a product which is a single compound. No ionic parts are exchanged.
Reaction 3 results in one compound being separated into its elemental parts. No ionic parts are exchanged.
Reaction 4 has two reactants, but Pb is an element and not an ionic compound. No ionic parts are exchanged.
Hence, the answer is Reaction 2. Both NaBr and Ca(OH)2 are ionic compounds. Br - is the anion in NaBr, and (OH)2 is also an anion. Ionic parts are exchanged.
Multiplication and Division. Quantities with exponents can be multiplied and divided easily if they have the same base. Since all number in scientific notation have base 10, we can always multiply them and divide them. To multiply two numbers in scientific notation, multiply their coefficients and add their exponents.
Answer:
1/3 = 0.33
Step-by-step explanation:
in a 6 sided die, there are numbers 1, 2, 3, 4, 5 and 6. So if you roll it once, there are 6 possible outcomes. so 6 is your sample space.
Out of all the possible outcomes, 5 and 6 are the only outcomes greater than 4.
P(an event occurring) = (number of ways it can occur)/(sample space)
∴p(roll greater than 4) = 2/6
=1/3
=0.333333333333333333333333............................
=0.33 (when rounded off to the 2nd decimal place)
So that's it!!! Hope i helped ya :)
Say you are adding in the ones place and it's more than 1 number you have to take the first number and put it in the hundreds. For example, 6+6=12 so you put the one in the hundreds place