How would you put 0.00000027 into scientific notation?

The sum of a number and 5 times the number is 18.find the number

Adentist's office and parking lot are on a rectangular piece of land. the area (in square meters) of the land is represented by x2+x? 30. a. write a binomial that represents the width of the land.

Write a subtraction problem that has mixed numbers and requires renaming. draw a model illustrating the steps you take to solve the problem.