Doing 4 times 362 with place value

Can you simplify this expression [3+4*8 - (16/4+10) ]

0.00023 converted to scientific notation

1810.75=1800 (1 + (43/180) x) the answer is 0.025 but I can not figure out the steps to get there.

7 1/2 of what number is 12

When 3x^2-2x+7 is subtracted from 5x^3-4x^2+10 what is the difference

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.