the average human hair measures about 90 micrometers wide which is 0.00009 correctly represent this in scientific notation

28 is what percent of 50?

I am thinking of 2 digit numbers. they have the same digit, only reversed. the difference between the numbers is 18, while the sum of the digits of each number is 10. find the 2 numbers?

The area of a rectangle is 7235. if the length and the width are proportiante by 5:3 then what is the length and the width

What are the solutions of the following system x2+y2=25, 2x+y=-5

1. Sergio deposits $3,100 into a bank account with an annual simple interest rate of 2.6%. a. How much interest does the account earn in 18 months? b. What is the balance of the account after 18 months?

The beginning balance of a credit card account is $500. The monthly interest rate is 0.012. If a payment of $100 is made on the last day of the month, what is the ending balance?

If 25% of an item is $17.00 what is the original price?

Slope and y intercept

A website requires a 7-digit password. How many different passwords can be made using the digits 0, 1, 2, 3, 4, 5, 6, 7, 8, and 9 if each number can only be used once? A. 120 B. 70 C. 5,040 D. 604,800

What is the solution for x in the equation? 3x - 42 = - 6x + 21