Convert 12,000+7*10^ (4) to scientific notation

In the last two weeks of a sale, prices are reduced first by 30% and then by a further 40% of the new price. What is the final sale price of a shirt which originally costs $15?

A rectangular family room is 18 feet long and 14 feet wide. Mr. Herzog has pieces of chair rail that are each 16 feet long that he wants to install around the perimeter of the room. How many pieces of chair rail will Mr. Herzog need?

In Eduardo's collection, the number of butterflies is 12 more than twice the number of moths. If there are x moths, write an expression to represent the number of butterflies he has.

14 less then the square of a number is the same as five times the number. find the number (it is negative)

How to solve 5s+7-2s=16

A salesperson obtained a systematic sample of size 30 from a list of 750 clients. To do so, he randomly selected a number from 1 to 25, obtaining the number 17. He included in the sample the 17th client on the list and every 25th client thereafter.

Jill received a stipend of $1,000 for the extra work she does on the job. She is going to deposit the money into her bank account that receives an annual compound interest of 4%. The account balance after year 3 is what

What kind of sequence is: 7,11,15,19

Todd owes $438.53 on his credit card. He returns two items, one for $49.36 and the other for $52.95. Then he makes purchases of $32.24 and $33.23. What is the new balance on the card?

Add and reduce: 7/24 + 11/24