Select the proper placement for parentheses to speed up the addition for the expression 4 + 6 + 5 a. (5 + 4) + 6 b. (4 + 6) + 5 c. (5 + 6) + 4 d. 4 + (6 + 5)

The answer is B. (4+6)+5.

Step-by-step explanation:

To find the proper placement for a parentheses to speed up the addition, fisrt we have to look the expression:

We can place the parentheses for the first two terms and make it simple, this is:

It makes the sum easy because you can make the sum in two parts.

The answer is B. (4+6)+5.

the correct answer is the second option

part d

step-by-step explanation:

theresa talked her parents into getting sd cards for her phone and her brother’s phone. inserting an sd card into a phone gives it more storage. they both get 8-gigabyte sd cards. how many bits of storage come with each sd card? type your answer in both scientific and standard notation.