What's 0.00045 in scientific notation

Show Work. 1.) 2.4/3.6 = k/1.8 2.) t/0.3 = 1.7/0.9 3.) 7/1.066 = z/9.65 4.) x-3/5 = 6/10 5.) 7/x+9 = 21/36 6.) 10/15 = 4/x-5

How do i find out what is 5% of 30

What is the sum of x + y when x = - 1.9 and y = - 7.4?

Write an equivalent expression to the expression below 17 times 93 and 17 times 97

Which number is one-third of the way between 2.2 and 8.5? 5.35 3.15 4.3 3.775 I have no idea how to do this.

A newspaper reporter wants to know how popular the hobby of bird watching is in the city. He asked people at the local bird refuge if they watched birds as a hobby. Which of the following best explains whether the reporters data is valid or not?

I am very confused on how to figure out if y = 3/4x is proportional?

Alison wants to buy a mountain bike for $339.12. If she saves $28.26 each month, in how many months will she be able to buy the bike?

At 12 o'clock the temperature was 7°C. The temperature decreased by - 20°C. What is the new temperature?

Ashleys rentals charges $27.50 per hour to rent a surfboard and a wetsuit. Darlas surf shop charges $23.25 per hour to rent a surfboard plus $17 extra for a wetsuit.